From: Wolfgang Soehne <[email-masked]>

Author : W. Soehne
Date: 04 Dec 1998 17:47:31 
Subject: [IGEXMail-0102] Subject

******************************************************************************
IGEX Electronic Mail    04-Dec-1998 17:47:31                   Message No 0102
******************************************************************************

Author: Wolfgang Soehne <[email-masked]>
Subject: Subject: Wk 0983 GFZ IGEX Analysis Report

Dear colleagues,

we like to present our results of GLONASS orbits for GPS week 0983.
Although the computed orbit overlaps are not very good, in general,
a comparison of the GFZ GLONASS orbits with the CODE GLONASS orbits 
for few days of GPS week 0981 shows a better agreement:

        RMS for DAY
PRN  298    299    300
----------------------
 3    19     63     50 
 4    25     42     58
 6    74     76     66
 9   220     26     42
10     -      -      -
11    48     63     75
12    21     50     50
13    19     23     23
14     -      -      -
15    58     40     12
16     -      -      -
17   121     53     39
18   161     93     23
20    51    102    182
21     -      -      -
22    17     19     43

Author : W. Soehne
Subject: Wk 0983 GFZ IGEX Analysis Report

******************************************************************************
GFZ IGEX ANALYSIS REPORT   GPS-WEEK 0983 (DAYS 312-318, DATES 08-11-98 TO 14-11-98)
******************************************************************************

Submitted by: GeoForschungsZentrum Potsdam (GFZ)
              Telegrafenberg A17, D-14473 Potsdam, Germany
              e-mail:[email-masked]
              fax: (0331) 288 1111
              tel: (0331) 288 1114 

SOLUTION CHARACTERISTICS

- Software used :   EPOS.P.V2
- Data used:
   - undifferenced carrier phases
   - 24 h arc solutions  
   - only stations with combined GPS and GLONASS dual frequency measurements
     or with GLONASS dual frequency measurements are used 
- Earth rotation parameters are fixed to their initial values
- GPS orbits from the IGS final solution are introduced and fixed (except
  eclipsing GPS satellites 
- Coordinates of only one station are fixed to their initials
  in the determination of ORBITS
- Adjusted parameters:
   - state vector of GLONASS satellites (and eclipsing GPS satellites)
   - coordinate corrections 
   - tropospheric zenith path delay (4 h)
   - y-bias, solar radiation scaling factor
   - ambiguities
   - STA and SV clock parameters of each observation epoch
   - one clock bias per station and day

CLOCK ESTIMATION:  KR0G is used as time reference
                   no offset and trend correction is performed

ORBITS REPEATABILITY (cm):
(mean component error rms =sqrt((xrms**2 + yrms**2 + zrms**2)/3) )

            DAY 1  (24 h)    pred.     DAY 2  (24 h)
   |------------------------|--------|                            
 
                            |------------------------|

   7.75-hour overlap:       |xxxxxxxx|

---------------------------------------------------
                 RMS for DAY
PRN  312    313    314    315    316    317    318    319
-------------------------------------------------------
 3  2175     42     98      -    112    150    257    289
 4   323    494     25     60      -    187    151    258
 6   635    343    277    356    128    103      -    133
 9   141    359    235    303    138    319     98     63
10     -      -      -      -      -      -      -      -
11  1366    243     59     81     49     40    119    529
12     -      -      -      -      -      -      -      -
13   754    459    161     17     46     92     59    112
14     -      -      -      -      -      -      -      -
15   516    646     20    437    257     83     42     78
16     -      -      -      -      -      -      -      -
17   155    161    194    128    151    195     83    128
18     8     18     88    112     56     38     19     37
20   262    389    102     85    175    194     68    173
21     -      -      -      -      -      -      -      -
22   121    316    279     20    126    111    164    509

STATIONS USED BY GFZ (P - processed)

Sampling rate: 5 minutes         
                                                          
 IGS  INTERNAL         
 CODE  STA#       311  312  313  314  315  316  317  318  319
----------------------------------------------------
wtzg  951001       P    P         P    P    P    P    P    P
sang  962001                           P
thu2  963001                      P    P    P    P    P    P
zimz  965001       P    P    P    P    P    P    P    P    P
brug  967001       P    P    P    P    P    P    P    P    P
borg  968001       P         P    P    P    P    P    P    P
godz  969001       P         P    P         P    P    P    P
csir  970001                           P
reyz  971001       P    P               
dlra  972001       P    P    P    P         P    P    P    P
3sna  973001                      P    P         P    P    P
irkz  976001       P    P    P    P    P    P    P    P    P
khab  977001            P    P    P    P    P    P    P
herp  979001                      P
gatr  980001            P    P    P    P    P    P    P    P
krog  982001       P    P    P    P    P    P    P    P    P
metz  983001                           P         P    P    P
mtka  987001       P    P    P    P             
lds1  988001       P         P    P    P         P    P    P
vsld  990001                 P    P    P    P         P    P
lrba  991001       P    P              P    P    P    P    P
yarr  992001                 P    P    P    P    P
os0g  993001                      P         P    P    P    P
sl1x  995001       P    P    P    P    P    P    P    P    P
usnx  996001                                P
nplc  997001                                          P    P
bipd  999001       P    P    P    P    P    P    P    P    P