Subject: [IGSREPORT-6943] Wk 1049 NOAA NGS Analysis Report
From: Bob Dulaney <[email-masked]>
To: [email-masked]
Date: Mon, 28 Feb 2000 13:58:38 -0500 (EST)

******************************************************************************
IGS Electronic Report   28 Feb 11:04:11 PST 2000      Message Number 6943
******************************************************************************

Author: NOAA/NGS GPS Analysis Center                                            
                                                                                
******************************************************************************* 
NGS ANALYSIS REPORT GPS WEEK 1049 (Dates:  0 Feb 13 -  0 Feb 19)                
******************************************************************************* 
National Oceanic and Atmospheric Administration (NOAA)                          
National Geodetic Survey (NGS), SSMC-3, N/NGS2                                  
1315 East-West Highway                                                          
Silver Spring, MD, USA  20910                                                   
                                                                                
contacts: William Kass    301-713-3209 ext.164   [email-masked]             
          Robert Dulaney  301-713-3209 ext.168   [email-masked]              
fax:                      301-713-4322                                          

PRODUCTS SENT TO CDDIS:                                                         
------------------------------------------------------------------------------  
 NGS10497.SUM         this text file                                            
 NGS10497.ERP         Earth rotation parameters for GPS Week 1049               
 NGS10497.SNX         weekly GPS coordinate solutions for GPS Wk 1049           
 NGS1049n.SP3         GPS ephemerides for GPS Week 1049, SP3 format (n=0..6)    
------------------------------------------------------------------------------  
                                                                                
SOLUTION CHARACTERISTICS:                                                       
------------------------------------------------------------------------------  
 Software             page5 developed at NOAA                                   
 Terr. Ref. Frame     nominally, ITRF97 at current epoch                        
 Observables          double-differenced carrier phase at 30-sec. intervals     
 Arc Length           24 hours                                                  
 Elevation Cutoff     15 degrees                                                
 Reference            file://igscb.jpl.nasa.gov/igscb/center/analysis/noaa.acn  
------------------------------------------------------------------------------  
                                                                                
STATISTICAL SUMMARY OF DAILY SOLUTIONS:                                         
------------------------------------------------------------------------        
          NUMBER      POST-FIT                                                  
 DOY   OBSERVATIONS   RMS (MM)   NO. SAT.   NO. SITES   NO. CONST. SITES        
------------------------------------------------------------------------        
 044     694681         11.1       28          65               41              
 045     669548         11.3       28          66               43              
 046     736197         11.3       28          65               42              
 047     731108         11.4       28          67               42              
 048     698941         11.4       28          64               42              
 049     751283         11.1       28          66               40              
 050     718004         11.4       28          66               40              
------------------------------------------------------------------------        
                                                                                
NUMBER OF OBSERVATIONS BY SATELLITE AND DOY:                                    
----------------------------------------------------------------------          
 PRN        044      045      046      047      048      049      050           
----------------------------------------------------------------------          
  01      24869    23386    25571    24916    22349    25054    24969           
  02      24945    25006    27677    28205    25922    26970    24222           
  03      24776    25216    28033    24322    23297    28354    25902           
  04      24214    23351    24994    25888E   30309E   31911E   29736E          
  05      24954    25597    26668    26584    24808    27996    22876           
  06      25012    22573    24327    23061    22416    23520    23902           
  07      23494    20835    24797    27259    23982    24699    24181           
  08      22409    21657    25692    25080    21236    22954    24234           
  09      46084    45044    48996    51754    43490    47092    45054           
  10      53840    46882    51018    53624    51298    42170    43032           
  11      58428E   57930E   62562E   60558E   58690E   63148E   59058E          
  13      53400    53110    54844    53946    51858    57150    54166           
  14      49392    41840    50596    44110    48768    49964    45860           
  15      46712    46880    46290    39290    43506    46868    47676E          
  16      56622    49696    60394    57916    52868    57164    47194           
  17      43828    41930    48872    50362    47920    52154    50440           
  18      45674    42004    45736    42644    42074    45360    40828           
  19      48488    43252    53840    54168    50266    50724    49798           
  21      49872    50596    52172    56318    53082    57472    56374           
  22      51058    42680    50658    51422    48026    49770    49172           
  23      55216    59420    61514    59696    57304    59614    58002           
  24      43910    45308    48348    51876    50348E   65196E   60796E          
  25      47626    51748    53542    54248    50700    57304    55682           
  26      50372    51198    53166    51868    48488    56088    53488           
  27      44136    42908    49568    48560    50152    51976    51540           
  29      55816    54044    57232    55582    56388    57846    58434           
  30      51728    51778    54960    60378    54456    58384    57386           
  31      47814    45606    52568    53266    49562    54206    51984           
----------------------------------------------------------------------          
NOTE: E = satellite eclipsing during day                                        
                                                                                
GLOBAL LIST OF SITES USED DURING WEEK:                                          
-----------------------------------------------------------------------------   
global: ALGO AREQ ASC1 AUCK BAHR BAKO BRMU CAS1 CHAT COCO CRO1 DAV1 DGAR DRAO   
global: EISL FAIR FORT GALA GODE GOL2 GRAZ GUAM HARK HOB2 IISC IRKT KELY KERG   
global: KOKB KOSG KSTU LHAS LPGS MAC1 MAG0 MALI MAS1 MATE MAW1 MCM4 MDO1 MKEA   
global: NLIB NOUM NTUS OHIG ONSA PERT PETP PIE1 POL2 POTS REYK RIOG SANT SHAO   
global: STJO SUTH THU1 TID2 TIXI TSKB VILL WES2 WHIT WTZR WUHN YAKZ YAR1 YELL   
global: ZWEN                                                                    
-----------------------------------------------------------------------------   
                                                                                
NUMBER OF OBSERVATIONS BY SITE AND DOY (AVERAGE PER BASELINE):                  
----------------------------------------------------------------------------    
       ION CODE$                                                                
 SITE   0123456    044      045      046      047      048      049      050    
----------------------------------------------------------------------------    
 ALGO*  2333222  12971    12669    13364    13245    13386    13869    13207    
 AREQ*    4344                      9020     8087     8208     8940             
 ASC1   4445 54   7210     6944     8310     7342              6902     6607    
 AUCK*  2223322   8366    10512    12794    12986    13205    13256    13218    
 BAHR*  54555 5   9838     8514     9793     9880     9296              8947    
 BAKO     3 333                    11636             10777    11489    11309    
 BRMU*  2332222  11808    10450    12372    12130    12911    13142    11977    
 CAS1*  7846767  10110     8830    10835    10301    10650    10929     9948    
 CHAT*  2223322  12565    12608    13230    13167    13336    13386    13321    
 COCO   5444444  12444    12225    11039    11459    11859    11965    12438    
 CRO1   34 3433  12457    11599             11759    13025    13226    11297    
 DAV1*  69        9801     7775                                                 
 DGAR   4343437   3670     3495     3780     6711     4708     7596     1803    
 DRAO*  2322222  14103    12775    14107    14337    14180    14165    13986    
 EISL   3332 32   7354     6418     7195     5450              8125     7798    
 FAIR*  4633322  11199     9781    13820    13226    12364    12826    13297    
 FORT*  4444444   4467     3986     6463     5297     3613     5491     4870    
 GALA     43444                     9681     8181     8409     9947     7338    
 GODE   3353 23  12372    10912             12612             14180    13295    
 GOL2*  3322322  11447    12078    11955    11829             11920    11267    
 GRAZ*  2222222  14262    13531    14507    14614    14523    14326    13897    
 GUAM*  4445544   5855     5727     6333     5766     5569     5668     5505    
 HARK*  3332333   8733     9020     8816     9089     9469     9404     9517    
 HOB2*  2222222  13009    12743    13532    13479    14121    14315    14318    
 IISC   43  444   3141     4030                       7378     2082     6245    
 IRKT*  222 222  12969    12476    12148             13473    12373    12126    
 KELY     56 34                     9606     6946              6173     7595    
 KERG*  2222222   8945    10889    11325     9786    11462    11126    11677    
 KOKB*  4444333  10454    10459    11573    10950    12514    12763    11324    
 KOSG*  2222222  14222    13225    13622    13659    13295    13961    13764    
 KSTU   22 2222  14555    14201             10008    14484    14435    14245    
 LHAS*  22232 2   5606     6513     6491     4548     7087              7555    
 LPGS   3443444   8520     7974    13441     8007     7610    11657    11917    
 MAC1*  3523423  11779    11235    12159    12195    11583    11875    10884    
 MAG0   2222222  11323    10119    10560    11276    11309    11598    11553    
 MALI*  3333334   4621     4772     4559     4845     5504     4400     4817    
 MAS1*  5556665  10835    10976    11624    10467    12072    10520    10266    
 MATE*  2322222  14063    13254    14281    14447    14343    14384    14142    
 MAW1   4535433   8903     8761    11251    10154    11450    11760    11436    
 MCM4*  7755656   8919     8499    10373    10432     9741    10062     8465    
 MDO1*  2222222  11363    10943    11018    10727    10745    11406    10193    
 MKEA   3 33322   9062             10146     9682    12514    10796     9625    
 NLIB*  2222222  11701    11218    12487    12421    12083    12566    12100    
 NOUM   4534323   3950     7862    12542    12940    13076    13171    13198    
 NTUS   4444444   8587     8245     7656     9392     8039     8625     8371    
 OHIG*  2233333  13606    13848    12736    13573    13839    14054    13450    
 ONSA*  2222222  14022     9260    15109    15169    14807    14686    14176    
 PERT*   222222           12800    12807    12500    12393    12139    12571    
 PETP   2222222  11400    10480    11168     7797    11330    12010    11844    
 PIE1*  2222222  12134    11493    12716    12537    12613    13267    12338    
 POL2   2222222   9869    10251     9558     8505    10118    10622    10466    
 POTS*  22222    15301    13425    15434    15431    15410                      
 REYK   3643322   9479     8683    10566    10095    10396    10229     9750    
 RIOG   3333333  13307    13129    13030    12281    12799    13781    12756    
 SANT*  4554555  11244    10451    10773     9336    10082    10681     9942    
 SHAO*  33 332   10663    10005             10114     9673    10163             
 STJO   2332222  12961    13221    13305    13122    13328    13301    12972    
 SUTH   2222222  12352    12010    12810    13085    12679    12571    12181    
 THU1*  8>57757   8104     5972    10038     8166     9796     8350     7936    
 TID2*  2222222  14498    13450    13891    14093    13001    13068    13241    
 TIXI   57444    11714    10781    12904    12983    12528                      
 TSKB*  2222222   9665     9016     9383     9031     9511    10102     9689    
 VILL*   333222           12610    13144    12889    12370    13042    12826    
 WES2*  2332222  12727    13045    13171    13311    13511    14055    13238    
 WHIT   3522222  11982    10978    14258    14068    13425    14173    13384    
 WTZR*  2222222  14700    14936    14969    14914    14951    14389    14005    
 WUHN   3333 22  11274     9301    10265    10636             11399    10430    
 YAKZ   2322222  13345    13188    12718    10819    13384    13248    12666    
 YAR1*  2222222  11395    12164    11578    11523    11448    11671    11934    
 YELL*  5754433  11807    11306    13100    12643    12585    13111    12105    
 ZWEN*  2222222  13164    13446    13212    12999    12598    13633    12205    
----------------------------------------------------------------------------    
NOTES: * Indicates sites with constrained coordinates.                          
       $ Ion codes given for each day with data. Values are an index of         
         (nominally) mean ionospheric variability with lower values denoting    
         less variation. > signifies values exceeding 9.499. Some types of      
         instrumental problems cause increases in this index unrelated to       
         ionospheric effects.                                                   
                                                                                
STATION GEODETIC STATISTICS FOR WEEK:                                           
--------------------------------------------------------------------------------
        AVERAGE          AVERAGE GEOCENTRIC COORDINATES        RMS RESIDUAL (MM)
 SITE    EPOCH         X (M)          Y (M)          Z (M)        N     E     U 
--------------------------------------------------------------------------------
 ALGO*  15066.5     918129.4560  -4346071.2502   4561977.8138     1     0     0 
 AREQ*  15067.0    1942826.7734  -5804070.2604  -1796893.9574     1     0     0 
 ASC1   15066.3    6118526.1080  -1572344.7151   -876451.1626     8    14     8 
 AUCK*  15066.5   -5105681.0825    461564.0443  -3782181.6870     1     2     2 
 BAHR*  15066.2    3633908.9631   4425275.5075   2799861.3390     3     1     2 
 BAKO   15067.7   -1836968.9958   6065617.0765   -716257.8035     3     4    15 
 BRMU*  15066.5    2304703.5558  -4874817.1856   3395186.8983     1     0     0 
 CAS1*  15066.5    -901776.1574   2409383.4093  -5816748.4842     1     2     2 
 CHAT*  15066.5   -4590670.9929   -275482.8721  -4404596.7362     1     1     1 
 COCO   15066.5    -741950.1406   6190961.6626  -1337768.4621     5     7    16 
 CRO1   15066.7    2607771.2028  -5488076.7562   1932767.7061     2     5    14 
 DAV1*  15064.0     486854.5595   2285099.3004  -5914955.7421     1     0     0 
 DGAR   15066.5    1916269.6419   6029977.3873   -801720.1050     8    30    47 
 DRAO*  15066.5   -2059164.7317  -3621108.4049   4814432.3446     1     1     0 
 EISL   15066.3   -1884951.5528  -5357595.9205  -2892890.5496     6     9    14 
 FAIR*  15066.5   -2281621.5029  -1453595.8060   5756961.8777     1     1     1 
 FORT*  15066.5    4985386.6385  -3954998.5988   -428426.4718     1     1     0 
 GALA   15067.5     -33795.9470  -6377522.6425    -82120.8856     5     4    10 
 GODE   15066.5    1130773.8314  -4831253.5840   3994200.3968     1     2     4 
 GOL2*  15066.3   -2353614.2262  -4641385.3747   3676976.4227     2     0     0 
 GRAZ*  15066.5    4194423.9200   1162702.6130   4647245.3428     0     0     0 
 GUAM*  15066.5   -5071312.7909   3568363.5235   1488904.3009     1     1     1 
 HARK*  15066.5    5084625.3168   2670366.3011  -2768494.5250     1     1     1 
 HOB2*  15066.5   -3950071.4832   2522415.2179  -4311638.2683     2     1     0 
 IISC   15066.7    1337936.6828   6070317.0996   1427876.5932     4    11    19 
 IRKT*  15066.5    -968332.2699   3794425.4212   5018167.7311     3     3     1 
 KELY   15067.5    1575559.2242  -1941827.9357   5848076.4891     4     4     7 
 KERG*  15066.5    1406337.3244   3918161.1173  -4816167.4081     4     2     3 
 KOKB*  15066.5   -5543838.1500  -2054587.0640   2387809.7809     1     1     0 
 KOSG*  15066.5    3899225.2166    396731.8660   5015078.3700     1     0     1 
 KSTU   15066.7    -174281.7954   3571333.0232   5264196.0086     8     4     8 
 LHAS*  15066.2    -106937.8095   5549269.5866   3139215.7892     1     2     1 
 LPGS   15066.5    2780102.9858  -4437418.8770  -3629404.5836     3     4     9 
 MAC1*  15066.5   -3464038.5625   1334172.8235  -5169224.3053     0     1     1 
 MAG0   15066.5   -2825810.2240   1581232.9301   5477005.4854     3     2     9 
 MALI*  15066.5    4865366.4341   4110737.4927   -331121.6767     1     3     6 
 MAS1*  15066.5    5439192.2551  -1522055.5753   2953454.7466     1     1     2 
 MATE*  15066.5    4641949.6648   1393045.3394   4133287.3703     1     0     0 
 MAW1   15066.5    1111287.1779   2168911.2756  -5874493.6383     2     7     9 
 MCM4*  15066.5   -1311703.2193    310815.0681  -6213255.1516     2     2     2 
 MDO1*  15066.5   -1329998.7124  -5328393.3952   3236504.1633     1     0     0 
 MKEA   15066.8   -5464105.1507  -2495166.7037   2148291.0232     2     3     9 
 NLIB*  15066.5    -130934.5226  -4762291.7350   4226854.6383     1     1     0 
 NOUM   15066.5   -5739971.5955   1387563.6146  -2402123.4449     5     5    18 
 NTUS   15066.5   -1508022.7805   6195576.6749    148799.4451     4     6    12 
 OHIG*  15066.5    1525872.5515  -2432481.3142  -5676146.1286     2     2     1 
 ONSA*  15066.5    3370658.6333    711877.0762   5349786.8938     1     1     0 
 PERT*  15067.0   -2368687.1173   4881316.5597  -3341796.0394     1     1     1 
 PETP   15066.5   -3576239.7883   1401003.4671   5075177.4745     3     4     6 
 PIE1*  15066.5   -1640916.8329  -5014781.2143   3575447.1014     1     1     0 
 POL2   15066.5    1239971.5026   4530790.0865   4302578.7668     4     5    15 
 POTS*  15065.5    3800689.7332    882077.3174   5028791.2600     1     1     0 
 REYK   15066.5    2587384.4362  -1043033.4969   5716563.9831     2     5     6 
 RIOG   15066.5    1429907.7644  -3495354.7792  -5122698.7066     2     4     2 
 SANT*  15066.5    1769693.4130  -5044574.1687  -3468321.0486     1     1     1 
 SHAO*  15066.1   -2831733.3671   4675666.0131   3275369.4630     2     1     1 
 STJO   15066.5    2612631.1829  -3426807.0357   4686757.8152     2     4     8 
 SUTH   15066.5    5041274.8491   1916054.0557  -3397076.0637     5     6     8 
 THU1*  15066.5     538981.3576  -1388714.8035   6181005.1286     1     1     1 
 TID2*  15066.5   -4460996.2436   2682557.0840  -3674443.5829     2     1     0 
 TIXI   15065.5   -1264873.0994   1569455.8079   6031003.4300     1     4     3 
 TSKB*  15066.5   -3957199.2432   3310199.6898   3737711.6593     1     1     0 
 VILL*  15067.0    4849833.7736   -335049.1217   4116014.8589     1     1     1 
 WES2*  15066.5    1492233.3355  -4458089.4893   4296045.9964     0     0     1 
 WHIT   15066.5   -2218337.8747  -2201205.1156   5543057.5493     2     2     3 
 WTZR*  15066.5    4075580.6466    931853.7202   4801568.0653     1     1     0 
 WUHN   15066.3   -2267749.2629   5009154.3083   3221290.7068     2     3     4 
 YAKZ   15066.5   -1915023.3092   2308213.2093   5610224.9741     2     7     4 
 YAR1*  15066.5   -2389025.6806   5043316.9098  -3078530.6081     2     1     0 
 YELL*  15066.5   -1224452.5575  -2689216.1202   5633638.2626     1     0     0 
 ZWEN*  15066.5    2886325.4856   2155998.4360   5245816.1502     5     3     2 
--------------------------------------------------------------------------------
NOTES: * Indicates sites with constrained coordinates.                          
                                                                                
WARNINGS:                                                                       
--------------------------------------------------------------------------------
 044: constrained site PERT not in data set                                     
    : constrained site VILL not in data set                                     
    : constrained site AREQ not in data set                                     
    : PRN 01    has < 2/3 as many obs as average                                
    : PRN 02    has < 2/3 as many obs as average                                
    : PRN 03    has < 2/3 as many obs as average                                
    : PRN 04    has < 2/3 as many obs as average                                
    : PRN 05    has < 2/3 as many obs as average                                
    : PRN 06    has < 2/3 as many obs as average                                
    : PRN 07    has < 2/3 as many obs as average                                
    : PRN 08    has < 2/3 as many obs as average                                
    : site DGAR has < 1/2 as many obs as average                                
    : site FORT has < 1/2 as many obs as average                                
    : site IISC has < 1/2 as many obs as average                                
    : site MALI has < 1/2 as many obs as average                                
    : site NOUM has < 1/2 as many obs as average                                
    : NOUM residual dU > 2*RMS =      40 mm                                     
 045: constrained site AREQ not in data set                                     
    : PRN 01    has < 2/3 as many obs as average                                
    : PRN 02    has < 2/3 as many obs as average                                
    : PRN 03    has < 2/3 as many obs as average                                
    : PRN 04    has < 2/3 as many obs as average                                
    : PRN 05    has < 2/3 as many obs as average                                
    : PRN 06    has < 2/3 as many obs as average                                
    : PRN 07    has < 2/3 as many obs as average                                
    : PRN 08    has < 2/3 as many obs as average                                
    : site DGAR has < 1/2 as many obs as average                                
    : site FORT has < 1/2 as many obs as average                                
    : site IISC has < 1/2 as many obs as average                                
    : site MALI has < 1/2 as many obs as average                                
    : ALGO residual dN > 2*RMS =       2 mm                                     
    : OHIG residual dU > 2*RMS =       2 mm                                     
 046: constrained site DAV1 not in data set                                     
    : constrained site SHAO not in data set                                     
    : PRN 01    has < 2/3 as many obs as average                                
    : PRN 02    has < 2/3 as many obs as average                                
    : PRN 03    has < 2/3 as many obs as average                                
    : PRN 04    has < 2/3 as many obs as average                                
    : PRN 05    has < 2/3 as many obs as average                                
    : PRN 06    has < 2/3 as many obs as average                                
    : PRN 07    has < 2/3 as many obs as average                                
    : PRN 08    has < 2/3 as many obs as average                                
    : site DGAR has < 1/2 as many obs as average                                
    : site MALI has < 1/2 as many obs as average                                
    : FAIR residual dN > 2*RMS =       2 mm                                     
    : YAKZ residual dN > 2*RMS =       4 mm                                     
 047: constrained site DAV1 not in data set                                     
    : constrained site IRKT not in data set                                     
    : PRN 01    has < 2/3 as many obs as average                                
    : PRN 02    has < 2/3 as many obs as average                                
    : PRN 03    has < 2/3 as many obs as average                                
    : PRN 04    has < 2/3 as many obs as average                                
    : PRN 05    has < 2/3 as many obs as average                                
    : PRN 06    has < 2/3 as many obs as average                                
    : PRN 07    has < 2/3 as many obs as average                                
    : PRN 08    has < 2/3 as many obs as average                                
    : site EISL has < 1/2 as many obs as average                                
    : site FORT has < 1/2 as many obs as average                                
    : site LHAS has < 1/2 as many obs as average                                
    : site MALI has < 1/2 as many obs as average                                
    : MKEA residual dE > 2*RMS =       5 mm                                     
    : NTUS residual dN > 2*RMS =      10 mm                                     
    : VILL residual dU > 2*RMS =       2 mm                                     
 048: constrained site DAV1 not in data set                                     
    : constrained site GOL2 not in data set                                     
    : PRN 01    has < 2/3 as many obs as average                                
    : PRN 02    has < 2/3 as many obs as average                                
    : PRN 03    has < 2/3 as many obs as average                                
    : PRN 05    has < 2/3 as many obs as average                                
    : PRN 06    has < 2/3 as many obs as average                                
    : PRN 07    has < 2/3 as many obs as average                                
    : PRN 08    has < 2/3 as many obs as average                                
    : site DGAR has < 1/2 as many obs as average                                
    : site FORT has < 1/2 as many obs as average                                
    : site GUAM has < 1/2 as many obs as average                                
    : site MALI has < 1/2 as many obs as average                                
    : KOSG residual dU > 2*RMS =       1 mm                                     
    : MAG0 residual dE > 2*RMS =       5 mm                                     
    : STJO residual dU > 2*RMS =      17 mm                                     
 049: constrained site BAHR not in data set                                     
    : constrained site DAV1 not in data set                                     
    : constrained site LHAS not in data set                                     
    : constrained site POTS not in data set                                     
    : PRN 01    has < 2/3 as many obs as average                                
    : PRN 02    has < 2/3 as many obs as average                                
    : PRN 03    has < 2/3 as many obs as average                                
    : PRN 05    has < 2/3 as many obs as average                                
    : PRN 06    has < 2/3 as many obs as average                                
    : PRN 07    has < 2/3 as many obs as average                                
    : PRN 08    has < 2/3 as many obs as average                                
    : site FORT has < 1/2 as many obs as average                                
    : site GUAM has < 1/2 as many obs as average                                
    : site IISC has < 1/2 as many obs as average                                
    : site MALI has < 1/2 as many obs as average                                
    : HARK residual dE > 2*RMS =       1 mm                                     
    : POL2 residual dN > 2*RMS =       9 mm                                     
    : ZWEN residual dU > 2*RMS =       4 mm                                     
 050: constrained site DAV1 not in data set                                     
    : constrained site POTS not in data set                                     
    : constrained site SHAO not in data set                                     
    : constrained site AREQ not in data set                                     
    : PRN 01    has < 2/3 as many obs as average                                
    : PRN 02    has < 2/3 as many obs as average                                
    : PRN 03    has < 2/3 as many obs as average                                
    : PRN 05    has < 2/3 as many obs as average                                
    : PRN 06    has < 2/3 as many obs as average                                
    : PRN 07    has < 2/3 as many obs as average                                
    : PRN 08    has < 2/3 as many obs as average                                
    : site DGAR has < 1/2 as many obs as average                                
    : site FORT has < 1/2 as many obs as average                                
    : site GUAM has < 1/2 as many obs as average                                
    : site MALI has < 1/2 as many obs as average                                
    : EISL residual dN > 2*RMS =      13 mm                                     
    : TID2 residual dE > 2*RMS =       2 mm                                     
    : WTZR residual dN > 2*RMS =       2 mm                                     
--------------------------------------------------------------------------------