[IGSMAIL-91] Earth orientation bulletin 6
IERS
IERS
Thu Sep 10 10:45:43 PDT 1992
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IGS Electronic Mail 10-SEP-1992 10:45:43 Message Number 91
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THIS FILE CONTAINS 2 MESSAGES
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>From: IERS CB
Subject: Earth orientation bulletin 6
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IGS'92 EARTH ORIENTATION BULLETIN 6
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9 SEPTEMBER 1992
1 - EARTH ORIENTATION PARAMETERS (IERS/CB evaluation) : EOP(IERS) 90 C 04
Date MJD x y UT1-UTC
1992 0.0001" 0.00001s
(0h UTC)
AUG 1 48835 -903.0 4450.0 40026.1
AUG 2 48836 -882.0 4474.0 39812.1
AUG 3 48837 -860.0 4497.0 39602.3
AUG 4 48838 -840.0 4520.0 39405.3
AUG 5 48839 -821.0 4541.0 39230.4
AUG 6 48840 -803.0 4561.0 39075.7
AUG 7 48841 -785.0 4578.0 38938.4
AUG 8 48842 -764.0 4598.0 38813.5
AUG 9 48843 -743.0 4619.0 38694.6
AUG 10 48844 -723.0 4643.0 38573.7
AUG 11 48845 -705.0 4669.0 38444.0
AUG 12 48846 -688.0 4694.0 38301.4
AUG 13 48847 -670.0 4718.0 38142.4
AUG 14 48848 -650.0 4741.0 37966.6
AUG 15 48849 -628.0 4763.0 37781.2
AUG 16 48850 -603.0 4783.0 37589.1
AUG 17 48851 -577.0 4801.0 37397.8
AUG 18 48852 -549.0 4817.0 37211.0
AUG 19 48853 -521.0 4832.0 37031.6
AUG 20 48854 -492.0 4846.0 36860.8
AUG 21 48855 -461.0 4858.0 36699.3
AUG 22 48856 -431.0 4870.0 36543.7
AUG 23 48857 -401.0 4881.0 36388.4
AUG 24 48858 -371.0 4893.0 36225.2
AUG 25 48859 -341.0 4906.0 36046.1
AUG 26 48860 -311.0 4920.0 35842.0
AUG 27 48861 -280.0 4934.0 35610.6
AUG 28 48862 -248.0 4949.0 35354.8
AUG 29 48863 -216.0 4963.0 35086.6
AUG 30 48864 -185.0 4975.0 34820.7
2 - INDIVIDUAL SERIES OF EARTH ORIENTATION PARAMETERS
The series listed hereafter,obtained by the IGS Processing Centres,
are described in the IGS'92 Earth Orientation Bulletin number 2 and in
the IGSMail Messages .
Note : AS (antispoofing) was activated on several satellites on
August 1, 2, 3, 8, 9 and 15.
2 -a - EOP(CODE) 92 P 03
Units : 0.0001" for x,y, 0.00001s for UT1.
Date Uncertainties
1992 MJD x y UT1-UTC Passes Span x y
UT1-UTC
hours
JUN 19 48792.50 -1504.3 3522.7 -53896.8 72.0 1.4 1.5 1.1
JUN 20 48793.50 -1523.8 3551.5 -54063.0 72.0 1.1 1.4 0.8
JUN 21 48794.50 -1485.6 3555.5 -54228.2 72.0 1.8 2.2 1.2
JUN 22 48795.50 -1510.9 3573.7 -54406.5 72.0 1.6 1.7 1.1
JUN 23 48796.50 -1489.2 3577.1 -54600.9 72.0 1.6 1.8 1.2
JUN 24 48797.50 -1497.6 3607.2 -54784.7 72.0 2.5 3.5 1.6
JUN 25 48798.50 -1468.0 3627.6 -54944.2 72.0 1.8 2.1 1.2
JUN 26 48799.50 -1487.3 3700.1 -55077.6 72.0 1.5 1.7 1.0
JUN 27 48800.50 -1471.2 3700.2 -55205.9 72.0 1.4 1.5 0.8
JUN 28 48801.50 -1443.3 3730.4 -55328.1 72.0 1.6 1.8 0.9
JUN 29 48802.50 -1433.7 3764.5 -55452.0 72.0 1.5 1.6 0.9
JUN 30 48803.50 -1420.1 3787.4 -55574.7 72.0 1.1 1.6 0.9
JUL 1 48804.50 -1409.0 3818.6 44284.6 72.0 1.0 1.4 0.8
JUL 2 48805.50 -1405.3 3840.3 44137.0 72.0 1.3 1.7 0.7
JUL 3 48806.50 -1384.0 3855.4 43968.5 72.0 1.0 1.4 0.7
JUL 4 48807.50 -1369.8 3874.9 43789.5 72.0 1.0 1.0 0.7
JUL 5 48808.50 -1358.4 3901.8 43616.3 72.0 1.0 0.9 0.6
JUL 6 48809.50 -1348.4 3916.2 43457.1 72.0 0.9 0.8 0.5
JUL 7 48810.50 -1340.8 3936.3 43321.1 72.0 1.0 0.9 0.6
JUL 8 48811.50 -1320.0 3965.0 43205.9 72.0 0.8 0.8 0.6
JUL 9 48812.50 -1307.0 3997.4 43101.8 72.0 0.9 0.9 0.6
JUL 10 48813.50 -1283.5 4008.1 43016.5 72.0 1.0 1.2 0.6
JUL 11 48814.50 -1271.9 4035.6 42935.4 72.0 1.0 1.0 0.7
JUL 12 48815.50 -1280.3 4060.3 42854.5 72.0 0.9 1.0 0.6
JUL 13 48816.50 -1266.4 4080.1 42760.9 72.0 1.0 1.1 0.6
JUL 14 48817.50 -1262.6 4096.8 42656.0 72.0 1.0 1.1 0.6
JUL 15 48818.50 -1236.1 4109.0 42547.1 72.0 0.9 1.0 0.6
JUL 16 48819.50 -1225.0 4128.9 42429.3 72.0 1.0 1.1 0.7
JUL 17 48820.50 -1206.6 4163.2 42298.1 72.0 1.4 1.8 0.7
JUL 18 48821.50 -1194.0 4176.9 42163.6 72.0 1.8 1.7 0.7
JUL 19 48822.50 -1165.1 4189.4 42018.8 72.0 1.3 1.6 0.7
JUL 20 48823.50 -1133.7 4251.7 41872.1 72.0 1.0 1.4 0.7
JUL 21 48824.50 -1092.2 4269.5 41726.2 72.0 1.1 1.5 0.6
JUL 22 48825.50 -1083.8 4277.3 41585.9 72.0 1.0 1.6 0.7
JUL 23 48826.50 -1073.0 4278.2 41454.9 72.0 1.0 1.2 0.7
JUL 24 48827.50 -1045.4 4300.7 41326.4 72.0 0.9 1.0 0.6
JUL 25 48828.50 -1031.5 4327.4 41201.9 72.0 1.0 1.2 0.6
JUL 26 48829.50 -1000.0 4333.9 41081.0 72.0 0.9 1.1 0.7
JUL 27 48830.50 -981.4 4354.6 40951.1 72.0 0.8 0.9 0.6
JUL 28 48831.50 -975.3 4390.2 40807.1 72.0 0.9 1.0 0.6
JUL 29 48832.50 -938.9 4409.8 40652.8 72.0 1.0 1.0 0.6
JUL 30 48833.50 -941.6 4413.5 40476.7 72.0 1.0 1.1 0.6
JUL 31 48834.50 -913.4 4433.0 40280.3 72.0 1.0 1.0 0.6
AUG 1 48835.50 -883.5 4483.1 40072.6 72.0 1.6 1.5 0.9
AUG 2 48836.50 -875.3 4495.1 39867.9 72.0 1.7 1.5 1.0
AUG 3 48837.50 -836.3 4515.3 39685.9 72.0 1.1 1.2 1.2
AUG 4 48838.50 -827.8 4544.1 39525.6 72.0 0.8 0.7 0.8
AUG 5 48839.50 -805.5 4561.0 39376.5 72.0 0.9 0.8 0.5
AUG 6 48840.50 -792.8 4570.1 39244.1 72.0 0.9 0.7 0.5
AUG 7 48841.50 -775.1 4592.8 39121.9 72.0 0.7 0.7 0.5
AUG 8 48842.50 -746.3 4628.1 39004.6 72.0 1.5 1.6 0.9
AUG 9 48843.50 -735.1 4627.8 38895.5 72.0 1.5 1.7 1.0
AUG 10 48844.50 -719.4 4664.0 38780.8 72.0 1.0 1.0 1.0
AUG 11 48845.50 -686.8 4702.5 38640.6 72.0 0.8 0.7 0.6
AUG 12 48846.50 -667.9 4708.9 38482.7 72.0 0.8 0.8 0.5
AUG 13 48847.50 -650.9 4736.5 38304.4 72.0 0.9 0.7 0.5
AUG 14 48848.50 -640.1 4768.1 38121.2 72.0 0.7 0.6 0.5
AUG 15 48849.50 -611.7 4785.0 37936.3 72.0 1.4 1.1 0.9
AUG 16 48850.50 -592.2 4800.8 37757.6 72.0 1.8 1.5 1.3
AUG 17 48851.50 -546.3 4813.5 37579.5 72.0 1.2 1.1 1.3
AUG 18 48852.50 -522.5 4834.0 37401.6 72.0 0.9 0.8 0.7
AUG 19 48853.50 -510.2 4848.2 37231.7 72.0 0.8 0.6 0.5
AUG 20 48854.50 -479.2 4865.7 37072.9 72.0 0.7 0.6 0.5
AUG 21 48855.50 -431.3 4876.6 36922.3 72.0 0.7 0.7 0.5
AUG 22 48856.50 -405.6 4895.1 36769.7 72.0 1.5 1.2 1.0
2 -b - EOP(CSR) 92 P 01
Units : 0.0001" for x,y, 0.00001s for UT1.
A recent description of this analysis can be found in IGSMail 81.
Date Uncertainties
1992 MJD x y UT1-UTC Passes Span x y
UT1-UTC
hours
AUG 11 48845.50 -690.3 4749.2 497 1.4 1.6
AUG 12 48846.50 -669.9 4763.5 468 1.5 2.0
AUG 13 48847.50 -645.8 4794.1 514 1.3 1.6
AUG 14 48848.50 -624.0 4788.1 505 1.4 1.4
2 -c - EOP(ESOC) 92 P 01
Units : 0.0001" for x,y, 0.00001s for UT1.
A recent description of this analysis can be found in IGSMail 85.
Date Uncertainties
1992 MJD x y UT1-UTC Passes Span x y
UT1-UTC
hours
AUG 16 48850.50 -550.5 4785.8 24.0 3.5 4.2
AUG 17 48851.50 -523.8 4802.3 24.0 3.6 3.9
AUG 18 48852.50 -502.3 4835.6 30.0 1.8 1.5
AUG 19 48853.50 -487.2 4841.2 30.0 1.9 1.7
AUG 20 48854.50 -455.8 4856.2 30.0 1.9 1.9
AUG 21 48855.50 -426.1 4867.9 30.0 2.6 2.2
AUG 22 48856.50 -394.5 4892.5 30.0 1.5 1.7
AUG 23 48857.50 -328.4 4909.7 30.0 1.6 1.5
AUG 24 48858.50 -327.6 4915.6 30.0 1.4 1.3
AUG 25 48859.50 -306.5 4935.0 30.0 2.8 3.1
AUG 26 48860.50 -251.0 4940.4 30.0 2.3 2.2
AUG 27 48861.50 -230.4 4958.1 30.0 2.0 2.1
AUG 28 48862.50 -206.8 4967.1 30.0 2.0 2.0
AUG 29 48863.50 -172.5 4991.6 30.0 2.0 1.9
2 -d - EOP(GFZ) 92 P 02
Units : 0.0001" for x,y, 0.00001s for UT1.
A recent description of this analysis can be found in IGSMail 86.
Date Uncertainties
1992 MJD x y UT1-UTC Passes Span x y
UT1-UTC
hours
JUL 19 48822.50 -1142.0 4225.0 3.0 3.0
JUL 20 48823.50 -1121.0 4256.0 3.0 3.0
JUL 21 48824.50 -1090.0 4273.0 3.0 3.0
JUL 22 48825.50 -1070.0 4290.0 4.0 3.0
JUL 23 48826.50 -1067.0 4311.0 4.0 4.0
JUL 24 48827.50 -1041.0 4329.0 3.0 3.0
JUL 25 48828.50 -1004.0 4343.0 3.0 3.0
JUL 26 48829.50 -982.0 4363.0 1.0 2.0
JUL 27 48830.50 -961.0 4383.0 3.0 3.0
JUL 28 48831.50 -943.0 4405.0 3.0 2.0
JUL 29 48832.50 -927.0 4429.0 3.0 2.0
JUL 30 48833.50 -908.0 4444.0 3.0 3.0
JUL 31 48834.50 -876.0 4463.0 3.0 3.0
AUG 1 48835.50 -853.0 4482.0 6.0 7.0
AUG 2 48836.50 -851.0 4514.0 10.0 10.0
AUG 3 48837.50 -843.0 4553.0 10.0 10.0
AUG 4 48838.50 -808.0 4568.0 6.0 7.0
AUG 5 48839.50 -774.0 4581.0 3.0 2.0
AUG 6 48840.50 -755.0 4598.0 3.0 2.0
AUG 7 48841.50 -746.0 4620.0 5.0 4.0
AUG 8 48842.50 -738.0 4658.0 8.0 8.0
2 -e - EOP(JPL) 92 P 02
Units : 0.0001" for x,y, 0.00001s for UT1.
A recent description of this analysis can be found in IGSMail 85.
Date Uncertainties
1992 MJD x y UT1-UTC Passes Span x y
UT1-UTC
hours
AUG 10 48844.50 -705.3 4690.3 1.9 2.2
AUG 11 48845.50 -688.8 4709.5 0.9 1.1
AUG 12 48846.50 -665.1 4731.9 0.9 1.0
AUG 13 48847.50 -648.1 4754.1 0.8 0.9
AUG 14 48848.50 -627.1 4766.1 0.9 0.9
AUG 17 48851.50 -546.2 4822.5 1.6 1.6
AUG 18 48852.50 -521.6 4835.1 0.8 0.9
AUG 19 48853.50 -493.3 4852.1 0.8 0.9
AUG 20 48854.50 -462.4 4862.0 0.8 0.9
AUG 21 48855.50 -429.9 4878.4 0.8 0.9
2 -f - EOP(SIO) 92 P 03
Units : 0.0001" for x,y, 0.00001s for UT1.
A recent description of this analysis can be found in IGSMail 81.
Date Uncertainties
1992 MJD x y UT1-UTC Passes Span x y
UT1-UTC
hours
AUG 15 48849.50 -593.6 4794.7 13 3.2 3.7
AUG 16 48850.50 -589.7 4809.0 8 3.9 4.2
AUG 17 48851.50 -552.3 4828.9 18 2.0 2.2
AUG 18 48852.50 -519.1 4845.7 18 1.4 1.4
AUG 19 48853.50 -489.6 4864.5 18 1.3 1.4
AUG 20 48854.50 -462.6 4881.5 15 1.6 1.8
AUG 21 48855.50 -426.6 4895.2 18 1.5 1.6
AUG 22 48856.50 -398.0 4898.4 8 7.2 6.5
AUG 23 48857.50 -352.1 4905.8 8 3.3 3.9
AUG 24 48858.50 -348.9 4932.6 18 2.6 2.7
AUG 25 48859.50 -307.7 4935.5 18 1.4 1.5
AUG 26 48860.50 -273.1 4952.4 18 1.3 1.3
AUG 27 48861.50 -243.6 4969.2 18 1.2 1.3
AUG 28 48862.50 -211.1 4986.6 18 1.3 1.3
3 - COMPARISONS OF GPS, SLR, AND VLBI EARTH ORIENTATION DETERMINATIONS
A paper version of this part, with plots, will be mailed to the IERS Analysis
Centres and to the IGS Processing Centres. Additional copies are available on
request.
3.1 - GPS: TERRESTRIAL FRAME ORIENTATION FIXING
Various strategies are tested by the GPS Processing Centres for maintaining
the terrestrial frame orientation. The choices concern the nominal orientation
(ITRF90 or ITRF91), the site motion model used to transfer the coordinates at
the reference epoch, the number of fiducial stations that are fixed, and the
source from which the fixed coordinates are taken. We summarize in Table 1
our understanding of the terrestrial frame definitions according to the Centres
and to the time periods.
Table 1 - GPS SOLUTIONS: TERRESTRIAL FRAME ORIENTATION
---------------------------------------------------------------------------
Series MJD GPS Nominal
(IERS label) from to weeks refrnce Source
---------------------------------------------------------------------------
EOP(CODE) 92 P 03 48792-48856 650-658 ITRF91 IERS (IGSMail 33)
EOP(CSR) 92 P 01 48794-48848 650-657 CSR+GSFC (IGSMail 33)
EOP(ESOC) 92 P 01 48794-48863 650-659 ITRF91 IERS (IGSMail 33)
EOP(GFZ) 92 P 01 48794-48821 650-653 ITRF90 SIO (01/91-05/92)
EOP(GFZ) 92 P 02 48822-48842 654-656 ITRF90 SIO (IGSMail 56)
EOP(JPL) 92 P 01 48794-48821 650-653 ITRF90 JPL (GIG'91+VLBI vel.)
EOP(JPL) 92 P 02 48820-48855 654-658 ITRF91 IERS (IGSMail 33)
EOP(SIO) 92 P 03 48780-48862 648-659 ITRF90 SIO (51 IGS'92 days)
--------------------------------------------------------------------------------
3.2 - VLBI, SLR, GPS EOP DETERMINATIONS: AGREEMENT WITH THE IERS SYSTEM
In this section, the GPS, SLR, and VLBI observations available over the time
period of the IGS'92 Campaign (MJD 48779-48862) are compared to the IERS series
EOP(IERS) 90 C 04, which is a combination of the series of Table 2. The
LLR series has only two results during the considered period, so it could not
be included in the comparisons.
Table 2 - IERS OPERATIONAL SERIES OF EOP
------------------------------------------------------------------------
Techn. Series Time Time EOP determined
span interv.
------------------------------------------------------------------------
VLBI EOP(NOAA) 92 R 01 24 h 3/4 d x, y, UT1, dPsi, dEps
VLBI EOP(NOAA) 92 R 02 1 h 1/2 d UT1
VLBI EOP(USNO) 92 R 03 24 h 7 d x, y, UT1, dPsi, dEps
LLR EOP(UTXMO) 92 M 02 1 h UT1
SLR EOP(CSR) 91 L 01 72 h 3 d x, y, "UT1"
SLR EOP(DUT) 91 L 02 120 h 5 d x, y, "UT1"
------------------------------------------------------------------------
The GPS series are those listed in Table 1. They give the x,y coordinates
of the pole, except CODE, which gives a series of UT1 that is tied at the
beginning of the complete series to an a priori value. The "UT1" determinations
obtained by the SLR Analysis Centre at DUT is left free, whereas in the CSR
SLR solution, it is tied to a VLBI solution for periods longer than about 60
days.
The GPS results are obtained from one-day observations of 16 to 18 satellites
in a network of 11 to 29 stations: 14-19 for CODE, 14-20 for CSR,11-18 for
ESOC,22-27 for JPL, and 17-29 for SIO.
Most of the centres treat independently the successive daily arcs, the
exceptions being CODE (three-day overlapping arcs) and GFZ (two-day
overlapping arcs). The centres estimate the EOP at 12h UT.
Table 3 gives the differences of the VLBI, SLR,and GPS series with
EOP(IERS) 90 C 04 under the form of a constant bias, corrected for the predicted
value of the systematic difference. In the case of the GPS results, which are
referred directly to ITRF, the predicted bias and its uncertainty are derived
from Table I-3, p.II-13 of the 1991 IERS Annual Report. It reflects the slight
misalignment of the IERS EOP relative to the IERS terrestrial frame. In the
case of the SLR and VLBI results, the expected values are derived from
analyses of previous years results. Note:the difference in UT for CODE(GPS)
is evaluated with a drift of 0.044 ms/d taken out.
Table 3 - SYSTEMATIC DIFFERENCES OF EOP RESULTS WITH IERS
--------------------------------------------------------------------------------
Techn Series x (0.001") y(0.001") UT1(0.0001s) Nmes
--------------------------------------------------------------------------------
VLBI EOP(NOAA) 92 R 01 0.39 +- 0.11 0.17 +- 0.15 0.03 +- 0.09 21
VLBI EOP(NOAA) 92 R 02 0.24 +- 0.10 62
VLBI EOP(USNO) 92 R 03 0.15 +- 0.17 0.02 +- 0.17 0.03 +- 0.20 12
SLR EOP(CSR) 91 L 01 0.42 +- 0.14 0.55 +- 0.18 0.15 +- 0.26 29
SLR EOP(DUT) 91 L 02 0.42 +- 0.20 -0.15 +- 0.30 17
GPS EOP(CODE) 92 P 03 -0.04 +- 0.36 0.27 +- 0.45 7.26 +- 0.49 65
GPS EOP(CSR) 92 P 01 0.17 +- 0.37 3.05 +- 0.47 53
GPS EOP(ESOC) 92 P 01 1.48 +- 0.39 -0.13 +- 0.49 70
GPS EOP(GFZ) 92 P 01 -2.44 +- 0.44 -2.66 +- 0.57 27
GPS EOP(GFZ) 92 P 02 -2.05 +- 0.38 1.55 +- 0.46 21
GPS EOP(JPL) 92 P 01 0.25 +- 0.37 1.64 +- 0.50 28
GPS EOP(JPL) 92 P 02 0.53 +- 0.35 0.28 +- 0.45 30
GPS EOP(SIO) 92 P 03 0.71 +- 0.35 1.65 +- 0.44 82
--------------------------------------------------------------------------------
3.3 - GPS: FORMAL AND ESTIMATED UNCERTAINTIES
The correlation of high frequency variations in the GPS polar motion results
was estimated on the basis of the residuals of each series of daily values
relative to its own smoothing (frequency cutoff: 1 cycle/8 days). The common
time intervals between two series cover 17 to 60 days. No significant
correlation was found.
Using the days which are common to pairs of series without change of reference
system, we estimate the true uncertainty of the daily EOP values by the Allan
variance (or pair variance) based on the 15 series of differences two by two
(see the 1991 IERS Annual Report, p.II-52). Table 4 shows the uncertainties
thus estimated for every GPS series, together with the corresponding rms
formal uncertainty provided by the Processing Centre.
Table 4 - ESTIMATED AND FORMAL UNCERTAINTY OF DAILY GPS POLAR MOTION VALUES
------------------------------------------------------------------------
Techn Series x (0.001") y(0.001") Nmes
estim. formal estim. formal
------------------------------------------------------------------------
GPS EOP(CODE) 92 P 03 0.24 0.12 0.24 0.13 53
GPS EOP(CSR) 92 P 01 0.70 0.20 0.60 0.22 53
GPS EOP(ESOC) 92 P 01 1.11 0.35 1.35 0.41 53
GPS EOP(GFZ) 92 P 01 1.08 0.86 1.16 0.89 26
GPS EOP(GFZ) 92 P 02 0.59 0.47 0.46 0.46 20
GPS EOP(JPL) 92 P 01 0.37 0.25 0.48 0.30 26
GPS EOP(JPL) 92 P 02 0.12 0.11 0.12 0.12 20
GPS EOP(SIO) 92 P 03 0.29 0.23 0.30 0.25 53
------------------------------------------------------------------------
3.4 - VLBI, SLR, GPS EOP DETERMINATIONS: DAY-TO-DAY AGREEMENT WITH IERS
The series of EOP obtained by VLBI, SLR and GPS already considered in Table 3
are considered now under the form of the weighted rms residual to
EOP(IERS) 90 C 04, after the biases of Table 2 are taken out. The statistics
are listed in Table 5. Note that the UT1 rms residual for CODE(GPS) is obtained
after taking out a linear drift of +0.044 ms/day.
Table 5 - WEIGHTED RMS DIFFERENCES OF EOP RESULTS WITH EOP(IERS) 90 C 04
The biases of Table 3 are taken out.
--------------------------------------------------------------------------------
Techn Series x (0.001") y(0.001") UT1(0.0001s) Nmes
--------------------------------------------------------------------------------
VLBI EOP(NOAA) 92 R 01 0.46 0.60 0.38 21
VLBI EOP(NOAA) 92 R 02 0.46 62
VLBI EOP(USNO) 92 R 03 0.36 0.23 0.51 12
SLR EOP(CSR) 91 L 01 0.42 0.47 0.72 29
SLR EOP(DUT) 91 L 02 0.73 1.11 6.88 17
GPS EOP(CODE) 92 P 03 0.81 0.90 2.08 65
GPS EOP(CSR) 92 P 01 0.97 1.24 53
GPS EOP(ESOC) 92 P 01 1.51 1.88 70
GPS EOP(GFZ) 92 P 01 1.37 1.86 27
GPS EOP(GFZ) 92 P 01 0.74 0.59 21
GPS EOP(JPL) 92 P 01 0.65 1.22 28
GPS EOP(JPL) 92 P 02 0.25 0.54 30
GPS EOP(SIO) 92 P 03 0.65 0.56 82
--------------------------------------------------------------------------------
==============================================================================
>From: J. Zumberge
Subject: JPL analysis report
-------------------
Submitted by
J F Zumberge, G Blewitt, M B Heflin, D C Jefferson, F H Webb
all at the Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA 91109.
The following files have been posted on BODHI (for access to BODHI contact
starr at logos.jpl.nasa.gov):
______________________________________________________________________________
filename contents
______________________________________________________________________________
jpl06597.sum This text file.
jpl06597.erp Earth rotation parameters for GPS week 659.
jpl06597.sp1 GPS ephemerides for GPS week 659, sp1 format.
jpl06597.sp3 " " " " " " , sp3 " .
______________________________________________________________________________
Because A-S was in effect for Sunday, August 23, we do not include results for
that day. A-S continued to be in effect on Monday, August 24, until 1000 UT.
Results for August 24 exclude data from block-II satellites before 1000.
Beginning sometime on August 26, GPS20 is poorly modeled. We recommend using
the broadcast ephemeris for that satellite in place of the "precise"
ephemerides in the sp1 and sp3 files.
WARNING: GPS20 is poorly modeled beginning sometime on Aug 26.
Beginning this week we include a "GROUND STATION INCLUSION TABLE", which
indicates which sites were used in the week's analysis. A blank entry means that
no data from the particular station were used on the corresponding day, while
an X means that data were used. Fiducial sites are denoted by '*'.
JPL UTPM TABLE GPS week 659 (1992 Aug 24 - Aug 29)
MJD X Y UT1R-UTC XSIG YSIG UTSIG RMS XYC XUC YUC STA SAT PASS
'' '' sec '' '' sec
48858.5 -.03406 .49175 .00000 .00019 .00021 .00000 .0 .02 .00 .00 23 18 0
48859.5 -.03120 .49281 .00000 .00008 .00009 .00000 .0 .00 .00 .00 26 18 0
48860.5 -.02802 .49407 .00000 .00008 .00009 .00000 .0 .02 .00 .00 25 18 0
48861.5 -.02483 .49535 .00000 .00008 .00009 .00000 .0 .02 .00 .00 26 18 0
48862.5 -.02172 .49678 .00000 .00008 .00009 .00000 .0 .03 .00 .00 25 18 0
48863.5 -.01869 .49865 .00000 .00008 .00009 .00000 .0 .03 .00 .00 26 18 0
END UTPM TABLE
The following table indicates the "3-dimensional orbit repeatability", as
defined in IGS Mail Message 37, for GPS week 659 (excluding Aug 23):
JPL ORBIT REPEATABILITY TABLE GPS week 659 (1992 Aug 24 - Aug 29)
92 8 24 92 8 25 92 8 26 92 8 27 92 8 28 92 8 29
prn rms (m)
2 1.3 1.54 1.09 1.08 0.72 0.78
3 2.0 1.63 0.38 0.39 0.30 0.34
11 2.8 2.02 0.37 0.60 0.72 0.39
12 2.3 0.94 0.92 0.89 0.90 0.97
13 1.7 1.20 0.23 0.49 0.49 0.23
14 2.0 1.47 0.89 0.96 0.80 0.84
15 2.3 2.03 0.62 0.99 0.97 1.09
16 2.2 0.71 0.80 0.71 0.80 0.71
17 1.6 1.69 0.71 0.88 0.59 0.76
18 1.9 1.74 0.80 0.67 0.34 0.45
19 2.0 1.70 0.79 0.53 0.45 0.48
20 1.9 625.84 716.69 893.39 919.25 854.38
21 0.8 1.58 1.18 1.41 1.19 1.10
23 1.9 1.83 0.55 0.32 0.59 0.49
24 1.1 1.03 0.60 0.51 0.49 0.55
25 1.1 1.89 0.64 0.63 0.87 0.65
26 2.0 1.20 0.72 0.73 0.86 0.93
28 2.4 1.14 0.82 0.69 1.03 0.74
END ORBIT REPEATABILITY TABLE
As described in IGS Mail Message 37, the following table compares the JPL
precise ephemerides with those from the broadcast ephemeris:
JPL COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
92 8 24 92 8 25 92 8 26 92 8 27 92 8 28 92 8 29
prn rms (m)
2 7.3 5.1 3.9 4.4 5.2 8.9
3 10.5 8.5 9.6 8.6 10.4 12.1
11 8.9 6.8 7.7 8.3 8.9 12.7
12 12.3 6.9 15.8 17.9 14.4 8.5
13 8.4 8.0 8.5 8.2 5.4 8.0
14 6.4 7.6 9.6 8.0 6.4 6.4
15 8.2 6.7 5.3 4.0 4.6 5.1
16 9.0 8.3 7.7 6.9 6.9 8.1
17 5.8 4.3 4.4 3.5 4.4 7.1
18 9.1 9.4 7.0 8.3 10.2 8.9
19 3.7 3.1 3.4 3.4 3.2 3.7
20 11.1 7.9 378.5 370.6 409.9 415.3
21 5.1 5.7 5.8 5.3 5.1 5.6
23 11.6 4.8 7.3 4.9 11.5 9.1
24 12.2 11.0 11.5 8.3 9.8 11.8
25 5.6 6.4 7.0 6.4 5.7 6.1
26 9.0 7.8 4.0 5.0 9.2 12.8
28 2.6 2.7 3.7 3.5 3.8 2.6
END COMPARISON OF BROADCAST NAVIGATION MESSAGE WITH PRECISE EPHEMERIDES
JPL GROUND STATION INCLUSION TABLE GPS week 659 (1992 Aug 24 - Aug 29)
92 8 24 92 8 25 92 8 26 92 8 27 92 8 28 92 8 29
ALBH X X X X X X
ALGO* X X X X X X
CANB X X X X X X
FAIR* X X X X X X
GOLD X X X X X X
HART* X X X X X X
HERS X X X X X X
JPLM X X X X X X
KOKB* X X X X X X
KOSG X X X X X X
MADR* X X X X X X
MATE X X X X X X
MCMU X X X X X X
METS X X X X X
NALL X X X X X
ONSA X X X X X X
PAMA X X X X X
PENT X X X X X X
SANT* X X X X X X
STJO X X X X X X
TAIS X X X X X X
TROM* X X X X X X
USUD X X X X X X
WETB X X X X
YAR1* X X X X X X
YELL X X X X X X
END GROUND STATION INCLUSION TABLE
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