Subject: [IGSREPORT-4698] Wk 0947 COD Analysis Report
From: M. Rothacher
Date: Fri, 13 Mar 1998 6:29:01 PST

******************************************************************************
IGS Electronic Report    Fri Mar 13  6:29:01 PST 1998      Message Number 4698
******************************************************************************

Author: M. Rothacher
Subject: Wk 0947 COD Analysis Report

*******************************************************************************
CODE ANALYSIS REPORT GPS WEEK 0947 (DAYS 060-066, DATES 01-03-98 - 07-03-98)
*******************************************************************************
Submitted by: Astronomical Institute, University of Berne, Switzerland
              Products available through anonymous ftp using:
              ftp ubeclu.unibe.ch  -or-  ftp 130.92.6.11
              after login: cd aiub$ftp; cd code
 
PROCESSING STRATEGY:
-----------------------------------------------------------------------------
IGSAR_95.PS   CODE IGS Annual reports for 1995 and 1996. Available on our    
IGSAR_96.PS   anonymous ftp (directory PAPERS)                               
 
CODE.ACN      CODE Analysis Center Questionaire containing details of our    
              current processing strategy and used models. Available at the  
              IGSCB and on our anonymous ftp (directory CODE)                
 
LAST CHANGES  Week 0947: **** THIS WEEK **** (see below)
              Week 0926: See IGSREPORT.4247 and IGSMAIL.1705                 
              Week 0873: See IGSREPORT.3056                                  
-----------------------------------------------------------------------------
 
FILES SENT TO CDDIS:
-----------------------------------------------------------------------------
COD09477.SUM           THIS TEXT FILE
COD09477.ERP           GPS DAILY EARTH ROTATION ESTIMATES, IGS FORMAT
COD0947N.EPH           GPS DAILY SATELLITE EPHEMERIDES, SP3 FORMAT (N=0..6)
COD09477.SNX_Z         GPS WEEKLY COORDINATE SOLUTION, SINEX FORMAT
-----------------------------------------------------------------------------
COD0947N.TRO           GPS DAILY TROPOSPHERE ESTIMATES, SINEX FORMAT (N=0..6)
                       (SEND TO GFZ ONLY)
-----------------------------------------------------------------------------
 
THREE DAY SOLUTION STATISTICS:
------------------------------------------------------
MIDDLE DAY  FILES  OBSERVATIONS   PARAMETERS  RMS (MM)
------------------------------------------------------
 60         312    600166         15186        1.4
 61         320    615347         15034        1.3
 62         318    616381         14923        1.3
 63         312    615947         14244        1.3
 64         304    607043         13912        1.3
 65         309    606133         13867        1.3
 66         318    620461         14392        1.3
------------------------------------------------------
SINEX WEEKLY STATISTIC:
------------------------------------------------------
 63        2193   4281478         99875        1.3
------------------------------------------------------
 
 REFERENCE CLOCKS:
 ---------------------------------------------------------
 DAY: 060  EONS used as reference clock
 DAY: 061  EWTR used as reference clock
 DAY: 062  EWTR used as reference clock
 DAY: 063  EWTR used as reference clock
 DAY: 064  EWTR used as reference clock
 DAY: 065  EWTR used as reference clock
 DAY: 066  EWTR used as reference clock
 ---------------------------------------------------------
 
 ORBIT REPEATABILITY (CM) FOR PRN: (-- = NOT INCLUDED)
 -------------------------------------------------------------------------------
      1E 2  3  4  5  6  7  8  9 10 13E14 15 16 17 18E19 21 22 23 24 25 26E27 29E30 31 
 -------------------------------------------------------------------------------
  60  8  5  3  3  5  3  4  5  5  5  5 78  4 31  4 13 40  5  4 12  5  5  7  4 15  6  4
  61  8  3  3  3  4  3  3  4  3  3  4172  3 42  3 12 53  4  2  7  4  5  5  4 12  5  2
  62  9  4  2  3  4  3  3  5  3  3  7110  3 43  3  9 36  3  3  9  3  4  9  5 17  5  4
  63 13  4  3  3  4  3  3  5  3  4  7102  4 98  4  6117  4  3 10  4  6 11  6 10  5  3
  64 16  4  3  4  3  2  3  5  4  3  4122  3 51  3  7 45  2  3  9  5  4 10  5 11  4  3
  65 17  4  3  4  4  3  3  4  3  3  3 23  3 70  3 11 71  3  3  8  4  5  7  6  8  4  6
  66 14  5  3  4  5  3  4  6  4  4  4 92  4 41  4 10 55  4  4 13 10  7 11  8 10  7  0
 -------------------------------------------------------------------------------
 ALL 13  4  3  3  4  3  3  5  4  3  5108  3 58  3 10 65  4  3 10  5  5  9  5 12  5  4
 -------------------------------------------------------------------------------

  WEEKLY COORDINATE COMPARISON OF 1-DAY (G1) SOLUTIONS  
 -------------------------------------------------------------------------------
 TOTAL NUMBER OF STATIONS:   106
 -------------------------------------------------------------------------------
                       WEEKDAY  RESIDUAL RMS IN MM
 STATION        #DAYS  0123456     N     E     U
 -------------------------------------------------------------------------------
 ALBH 40129M003     7  PPPPPPP     3     7     5
 ALGO 40104M002     7  PPPPPPP     3     1     8
 ALIC 50137M001     4  PP  P P     3     4     4
 ANKR 20805M002     2    PP        3     5     4
 AREQ 42202M005B    7  PPPPPPP     3     9    12
 ASC1 30602M001     7  PPPPPPP     4    10    16
 AUCK 50209M001     7  PPPPPPP     5     4     4
 BAHR 24901M002     7  PPPPPPP     4     6     7
 BOGT 41901M001     3  P    PP    10    10    24
 BOR1 12205M002     7  PPPPPPP     2     4    15
 BRMU 42501S004     7  PPPPPPP     2     5     8
 BRUS 13101M004     7  PPPPPPP     1     2     5
 CAS1 66011M001     3  PPP         8    10     7
 CHAT 50207M001     7  PPPPPPP     5     4     7
 COCO 50127M001     2  PP          1     4    16
 CRO1 43201M001     6   PPPPPP     4     3     5
 DAV1 66010M001     7  PPPPPPP     5    10     6
 DGAR               6  PPPPPP      8    11    15
 DGAR 30802M001     1        P     -     -     -
 DRAO 40105M002     7  PPPPPPP     4     6     6
 DUBO 40137M001     7  PPPPPPP     2     2     5
 EISL 41703M003     7  PPPPPPP     3    15     8
 FAIR 40408M001B    7  PPPPPPP     0     3     4
 FLIN          B    6  PPPPPP      1     2     3
 FLIN 40135M001B    1        P     -     -     -
 FORT 41602M001     7  PPPPPPP     6     7    19
 GODE 40451M123     7  PPPPPPP     2     1     5
 GOLD 40405S031     7  PPPPPPP     5     9     9
 GOPE 11502M002     7  PPPPPPP     1     2     9
 GRAS 10002M006B    7  PPPPPPP     2     3     8
 GRAZ 11001M002B    7  PPPPPPP     2     3     7
 GUAM 50501M002     7  PPPPPPP     5    13    17
 HART 30302M007     6  P PPPPP     8    13    13
 HOB2 50116M004     5    PPPPP     4     5     7
 HOFN 10204M002     7  PPPPPPP     3     3     7
 HRAO 30302M004     7  PPPPPPP     7    13    12
 IISC 22306M001B    1  P           -     -     -
 IISC 22306M002     1        P     -     -     -
 IRKT 12313M001     6  PPPP PP     4     8    10
 JOZE 12204M001     6  P PPPPP     1     3     4
 KARR 50139M001     7  PPPPPPP     3     7     9
 KELY 43005M001     7  PPPPPPP     3     5    13
 KERG 91201M002     6  PPPP PP     6    10     8
 KIRU 10403M002     7  PPPPPPP     4     6    19
 KIT3 12334M001     3      PPP     9     7    20
 KOKB 40424M004     7  PPPPPPP     2    10     6
 KOSG 13504M003     7  PPPPPPP     0     1     4
 KOUR 97301M210B    7  PPPPPPP     3     9     8
 KWJ1               6  PPPPPP      3     9    15
 KWJ1 50506M001     1        P     -     -     -
 LAMA 12209M001     7  PPPPPPP     3     8     5
 LHAS 21613M001     7  PPPPPPP     7    11     9
 LPGS 41510M001     6  PPPPP P     5    11    20
 MAC1 50135M001     6  PPPPP P     4     6     9
 MALI 33201M001B    6   PPPPPP     5    11    15
 MASP 31303M002C    5  PP PPP      4     3    14
 MASP 31303M002     1        P     -     -     -
 MATE 12734M008B    7  PPPPPPP     2     4    10
 MAW1 66004M001     6  PPPP PP     7    10     8
 MCM4 66001M003     7  PPPPPPP     6     7     8
 MDO1 40442M012     7  PPPPPPP     3     6    10
 MDVO 12309M002     7  PPPPPPP     2     6     7
 METS 10503S011     5  P PPP P     1     5     5
 MKEA               6  PPPPPP      0     2     4
 MKEA 40477M001     1        P     -     -     -
 MOIN 40601M001     6   PPPPPP     4     6    14
 MONP 40497M004     7  PPPPPPP     3     7     8
 NICO 14302M001     5  PPPPP       2     6    15
 NLIB 40465M001     7  PPPPPPP     2     2     7
 NRC1 40114M001     7  PPPPPPP     2     2     5
 OHIG 66008M001     2       PP     2     5    30
 ONSA 10402M004     7  PPPPPPP     1     4     5
 PERT 50133M001     7  PPPPPPP     2     7    13
 PIE1 40456M001     7  PPPPPPP     3     6    11
 POL2 12348M001     5  PPPPP       8     4     5
 POTS 14106M003     7  PPPPPPP     1     3     5
 QUIN 40433M004     7  PPPPPPP     4     8    12
 REYK 10202M001     7  PPPPPPP     2     4     9
 RICH 40499S018C    6  PPPPPP      2     2     6
 RICH 40499S020     1        P     -     -     -
 SANT 41705M003B    7  PPPPPPP     5     4     4
 SCH2 40133M002     7  PPPPPPP     2     4     4
 SHAO 21605M002     7  PPPPPPP     6     9    12
 STJO 40101M001B    7  PPPPPPP     4     6    20
 TAEJ 23902M001B    5    PPPPP     6    11    10
 TAHI 92201M006     6  PPP PPP     5    11    10
 TELA               6  PPP PPP     2     7     9
 THU1 43001M001     7  PPPPPPP     3     2     8
 TIDB 50103M108C    7  PPPPPPP     2     3     4
 TOW2 50140M001     5  PPPP P      3     5     5
 TSKB 21730S005     7  PPPPPPP     5     9    10
 UPAD 12750M002B    2   PP         1     0     1
 USNO 40451S003     7  PPPPPPP     2     1     5
 USUD 21729S007     7  PPPPPPP     6     7     9
 WES2 40440S020     7  PPPPPPP     2     3     6
 WHIT               6  PPPPPP      1     2     2
 WHIT 40136M001     1        P     -     -     -
 WSRT 13506M005     7  PPPPPPP     1     1     5
 WTZR 14201M010     7  PPPPPPP     2     0     4
 WUHN 21602M001     7  PPPPPPP     5     9    10
 XIAN 21614M001     3   PPP        2     1     5
 YAR1 50107M004B    7  PPPPPPP     2     7     9
 YELL 40127M003B    7  PPPPPPP     3     4     2
 ZECK 12351M001     7  PPPPPPP     3     6     7
 ZIMM 14001M004     7  PPPPPPP     2     1     6
 ZWEN 12330M001     7  PPPPPPP     3     6     9
 -------------------------------------------------------------------------------
 # Coordinate Estimates:   608     4     6     9

 REMARKS: Day  60: Modeling problems for PRNs 14, 16
          Day  61: Modeling problems for PRN  14
          Day  62: Modeling problems for PRN  14
          Day  63: Modeling problems for PRN  16
          Day  64: Modeling problems for PRNs 14, 16, 19
          Day  65: Modeling problems for PRNs 14, 16
          Day  66: Modeling problems for PRN  14
          Day  66: PRN 31 excluded due to manoeuvre

Processing changes 
==================

 Starting this week a number of (IGS) processing "standards" 
 have been changed.
 For the CODE analysis this means the following changes:
   - Reference frame changes:
     - ITRF96 coordinates,
     - ITRF96 velocity field,
     - Use of a subset of 37 of the new set of 47 feference stations

       The 11 feference sites not used:
       --------------------------------
       TROM: No data. Receiver and Antenna are being replaced(?)
       NYAL: No data. Receiver and Antenna are being replaced(?)
       MADR: Site no longer used due to severe data problems in 1997
       MASP: Strong 14-day periods in our solutions
       MALI: 40 mm U difference between ITRF96 and CODE
       FAIR: 20 mm U difference between ITRF96 and CODE
       GODE:-20 mm U difference between ITRF96 and CODE
       TIDB: 25 mm U difference between ITRF96 and CODE
       OHIG:-18 mm N difference between ITRF96 and CODE
       DAV1:-10 mm N difference between ITRF96 and CODE
       KERG:-12 mm E difference between ITRF96 and CODE

       The 37 sites which are constrained (1 mm):
       ------------------------------------------
       ALGO AREQ BRAZ BRMU DRAO FORT GOLD GRAZ GUAM HART HOB2 IRKT 
       KIT3 KOKB KOSG KOUR KWJ1 LHAS MAC1 MATE MDO1 NLIB ONSA PERT 
       PIE1 POTS REYK SANT SHAO THU1 TSKB VILL WES2 WTZR YAR1 YELL 
       ZWEN

       **** Note that we selected one additional site: REYK

     - The ITRF96 reference frame is realized by constraining the
       positions of the 37 selected sites to 1 mm (this used to be
       0.1 mm). This means that the sites may actually move by
       several millimeters.

   - Site coordinate model change:
     - Ocean loading (finally) included based on values from
       Dr. H.G. Scherneck.

 Estimated CODE product changes
 ==============================

   We estimated the changes in our products (orbits, coordinates 
   and ERPs) caused by the above modification, by processing five days 
   with the old and the new strategy (day 060-064 of 1998).
   The consistency between the results is very high as you can
   see from the table below.

                       DX    DY    DZ     RX    RY    RZ   SCALE  RMS 
                      (mm)  (mm)  (mm)  (mas) (mas) (mas)  (ppb)  (mm)
   CRD 060 NEW-OLD      0    -3    -6   -0.1  -0.0  -0.3    0.5    8.9
   CRD 061 NEW-OLD     -2    -1    -4   -0.1  -0.0  -0.3    0.4    8.8
   CRD 062 NEW-OLD     -1    -1    -4   -0.1  -0.0  -0.3    0.4    8.3
   CRD 063 NEW-OLD      1    -2    -4   -0.1  -0.0  -0.3    0.3    7.9
   CRD 064 NEW-OLD      3    -3    -3   -0.1  -0.0  -0.2    0.1    7.5

   ORB 060 NEW-OLD      2     2     1    0.23 -0.11 -0.40   0.1   20.0
   ORB 061 NEW-OLD      0     1     4    0.17 -0.13 -0.40   0.0   20.0
   ORB 062 NEW-OLD      1     2     6    0.14 -0.06 -0.37   0.0   20.0
   ORB 063 NEW-OLD      2     0     5    0.10 -0.02 -0.38   0.0   10.0
   ORB 064 NEW-OLD      0    -2     2    0.13 -0.03 -0.34   0.0   10.0
                                                                       
   ERP 060-064 NEW-OLD                   0.07 -0.17  

   As noted already by the ACC (Jan Kouba) the change from ITRF94 to
   ITRF96 causes small rotations around Y (-0.2 mas) and Z (-.2 mas).
   Both effects can clearly be seen in our orbit (ORB) and
   ERP results above (note the RX and RY have a
   different meaning for the orbit than for the ERPs).
   The Z-rotation is also clearly observed in the coordinate (CRD)
   differences. The CRD results also show a small scale difference
   which indicates that the scale between ITRF94 and ITRF96 is
   slightly different, or at least that our realization of the
   two ITRF's is different.
   The entire CODE ERP series from day 200/1993 to today has been
   recomputed using the above reference frame realization. Over the
   entire period of 4.5 years the offset between the ITRF94 and 
   ITRF96 series are:
     - X   (ITRF96-ITRF94) : -0.037 mas
     - Y   (ITRF96-ITRF94) : -0.075 mas
     - LOD (ITRF96-ITRF94) : -0.004 ms/day

   An updated AC questionaire (CODE.ACN) has been send to the IGSCB and the
   ACC. It is also available on our anonymous ftp.
 
global: ALBH ALGO ANKR AREQ ASC1 AUCK BOR1 BOGT BRAZ BRMU BRUS CAS1 CHAT CRO1
global: DAV1 DRAO EISL FAIR FORT GODE GOLD GOPE GRAS GRAZ GUAM HART HRAO HOB2
global: IISC IRKT JOZE KELY KERG KIT3 KOKB KOSG KWJ1 LAMA LHAS LPGS MAC1 MALI
global: MAS1 MATE MCM4 MDO1 MDVO METS MOIN MONP NRC1 NLIB OHIG ONSA PERT PIE1
global: POL2 POTS QUIN RCM5 REYK SANT SEY1 SHAO STJO TAHI TAIW TIDB TAEJ THU1
global: TSKB UPAD USUD WTZR YAR1 YELL WES2 ZIMM COCO CHUR FLIN WHIT BAHR WUHN
global: MKEA DGAR XIAN VILL ZWEN KSTU WSRT USNO NTUS KIRU NICO KOUR ZECK GALA
global: HOFN SCH2 DUBO

[Mailed From: MARKUS ROTHACHER <[email-masked]>]