Subject: [IGSREPORT-248] GFZ Analysis Report (week 692)
From: G. Gendt
Date: 4 MAY 1993 08:52:02

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IGS Electronic Report      4-MAY-1993 08:52:02       Message Number 248
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From: G. Gendt
Subj: GFZ Analysis Report (week 692)
------------------------------------

******************************************************************************
GFZ ANALYSIS REPORT   GPS-WEEK 0692 (DAYS 101-107, DATES 11-04-93 TO 17-04-93)
******************************************************************************

Submitted by: G. Gendt, Ch. Reigber, G. Dick, Th. Nischan, W. Mai
              GeoForschungsZentrum Potsdam (GFZ)

              Telegrafenberg A17, O-1560 Potsdam, Germany
              e-mail:[email-masked]
              fax: (0331) 310 648
              tel: (0331) 310 252

______________________________________________________________________________
Beginning with week 692  following changes have been made in our analysis
scheme:
1. We used 6-minute data instead of 4-minute data
2. We increased the number of considered core sites by adding
   Hobart, Kourou, Metsahovi, Onsala, Penticton, Westford
3. We changed our terrestrial reference frame to have more accurate initial
   coordinates (solution of all 1993-data) and to have a better alignment to
   the ITRF93-System. This results in a shift for the pole coordinates of
   dx=0.0029 mas, dy=-0.0017 mas compared to our old reference frame.
   The pole solution has a jump between days 100 and 101. In the file
   gfz06927.erp we send also the corrected values from week 679 to 691.
______________________________________________________________________________
PRODUCT SUMMARY

FILES SENT TO IGN:
______________________________________________________________________________
gfz06927.sum           this text file
gfz06927.erp           Earth rotation parameters for weeks 679 to 692
gfz0692[0-6].eph       Daily orbit ephemerides , SP1 format
______________________________________________________________________________

ERP RESULT

  MJD        X        Y      UT1-IAT     XSIG    YSIG                   STA SAT
           arcsec   arcsec     sec      arcsec  arcsec
49088.500  0.08450  0.16439 -27.230498  0.00002 0.00002  0.0 0. 0. 0. 0. 28 22
49089.500  0.08160  0.16512 -27.231853  0.00002 0.00003  0.0 0. 0. 0. 0. 27 22
49090.500  0.07929  0.16472 -27.229199  0.00002 0.00002  0.0 0. 0. 0. 0. 27 22
49091.500  0.07787  0.16446 -27.226545  0.00002 0.00002  0.0 0. 0. 0. 0. 28 22
49092.500  0.07661  0.16453 -27.223891  0.00002 0.00002  0.0 0. 0. 0. 0. 25 22
49093.500  0.07401  0.16448 -27.221237  0.00002 0.00002  0.0 0. 0. 0. 0. 22 22
49094.500  0.07211  0.16394 -27.221237  0.00002 0.00002  0.0 0. 0. 0. 0. 26 22
-------------------------------------------------------------------------------

  MJD          LODR    +/-
             (ms/day)

49088.5000   2.7252  0.002
49089.5000   2.7763  0.002
49090.5000   2.9000  0.002
49091.5000   2.8959  0.002
49092.5000   2.9592  0.002
49093.5000   3.0595  0.002
49094.5000   2.9301  0.002
-----------------------------

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

            DAY 1  (32 h)              DAY 2  (32 h)
   |------------------------|--------|

                            |------------------------|--------|

   Six-hour overlap:        |xxxxxx|

   (only rms < 120 are used for MEAN)

---------------------------------------------------------------------------
DAY MEAN   1  2  3 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
---------------------------------------------------------------------------
101  34  120 28 41 42 15 14 43 31 22 33 39 34 27 35 33 22 19 70 29 30 42 28
102  57  107 49 38 41 23 37 70 36 14 41 62 85 57 47 43 40 33 65 40 52 36***
103  32   69 23 27 16 40 16 27 21 21 18 37 37*** 22 23 31 19 30 50 27 34***
104  34   59 17 26 29 23 11 34 29 18 22 49 59 38 27 26 26 19 35 54 22 34***
105  37   82 22 25 29 24 18 40 23 29 28 49 53 31 45 29 37 15 27 57 25 27164
106  39   72 26 23 23 26 25 26 27 20 31 60 46 29 23 33 28 23 29 68 19 39 74
107  41   62 29 16 26 23 16 35 24 24 16 58 34 47 30 29 43 26104 41 38 40 40
---------------------------------------------------------------------------

REMARKS: on DAY 103 manoeuver of satellite 20
         satellite 29 not used on days 102,103,104
         Satellites 1 and 29 were deweighted this week.

STATIONS USED BY GFZ INCLUDING STATISTICS

Sampling rate: 6 minutes

 IGS  INTERNAL         OBSERVATIONS for DAY
 CODE  STA#       101  102  103  104  105  106  107
----------------------------------------------------
onsa  105001      1167 1173 1218  635 1502 1495 1527
kosg  110001      1522 1429 1080  752 1499 1500 1507
madr  120001      1372 1366 1316 1344 1477 1383 1451
mate  130001      1439 1334 1201 1220 1446 1433 1452
trom  150001      1617 1505 1428 1406 1493 1529 1511
wetb  160001       940  560  448 1005 1456 1061  332
mets  180001      1485 1372 1335 1362 1460 1451 1461
usud  200001        40    0    0  927  814  921 1175
taiw  220001      1360 1296 1272 1358 1392 1434 1429
tidb  305001      1502 1500 1469 1369 1423 1480 1465
yar1  310001      1485 1348 1368 1281 1390 1477 1243
hob1  320001       841  557  701  821  569 1069 1430
algo  400001      1444 1379 1351 1421 1493 1500 1440
stjo  405001      1474 1401 1379 1379 1457 1461 1471
wes2  408001      1367 1331 1343 1415 1469 1465 1465
gold  410001      1392 1285 1333 1351 1363 1441 1441
jplm  415001       966 1046 1349 1425 1348  947  698
fair  420001         0  631 1361 1407 1460 1461 1450
yell  470001      1509 1430 1375 1411 1496 1512 1487
drao  475001      1459 1384 1360 1385 1470 1437 1477
rcm2  480001      1453 1387 1361 1414 1462 1447 1439
sant  500001      1434 1363 1345 1332 1421 1366 1234
kour  510001      1431 1370 1337 1384 1440 1448 1399
hart  600001      1213 1148 1138  868 1174 1169  897
masp  610001      1538 1479 1439 1464 1499 1471 1473
kokb  700001      1521 1409 1409 1461 1542 1533 1469
pama  710001      1484 1391 1258 1019 1511 1102    0
mcmu  800001      1700 1595 1573 1520 1654 1022 1007
----------------------------------------------------

SATELLITES STATISTICS

                OBSERVATIONS for DAY
PRN     101  102  103  104  105  106  107
------------------------------------------
  1    1544 1576 1563 1511 1651 1584 1498
  2    1544 1561 1537 1449 1546 1536 1463
  3    1780 1840 1902 1816 1938 1919 1834
 11    1363 1399 1415 1432 1470 1434 1330
 12    1524 1565 1656 1602 1633 1534 1466
 13    2175 2124 2153 2154 2315 2248 2122
 14    1821 1722 1746 1712 1854 1824 1684
 15    1457 1455 1499 1524 1630 1567 1491
 16    1851 1974 2025 1990 2132 1996 1869
 17    1640 1677 1696 1609 1748 1730 1564
 18    1794 1746 1744 1782 1880 1813 1726
 19    1498 1507 1532 1532 1665 1650 1542
 20    1679 1263  726 1638 1798 1755 1685
 21    1488 1443 1543 1514 1596 1611 1477
 22    1482 1487 1523 1640 1642 1526 1510
 23    1553 1614 1633 1592 1684 1627 1482
 24    2057 2074 2137 2106 2276 2189 2091
 25    1653 1710 1742 1752 1871 1831 1683
 26    1635 1734 1770 1776 1862 1742 1665
 27    1549 1581 1565 1555 1699 1630 1512
 28    1380 1417 1440 1450 1512 1516 1421
 29    1688    0    0    0 1778 1753 1715
------------------------------------------

SOLUTION CHARACTERISTICS

1. Software used :   EPOS.P.V2
2. Definition of Terrestrial Reference Frame
     Fiducial-free adjustment of all station coordinates.
     These  coordinates are then fixed in the determination of ERPs and ORBITS

3. Data used:
   - undifferenced carrier phases
   - 32 h arc solutions

5. Adjusted parameters:
   - state vector of all satellites
   - coordinate corrections
   - daily ERPs
   - tropospheric zenith path delay (6 h)
   - y-bias, solar radiation scaling factor
   - ambiguities
   - STA and SV clock parameters of each observation epoch