GPS Satellite Info as of 24 Feb 2009 and 20 Mar 2009
- From: Sam Wormley <swormley1@xxxxxxxxx>
- Date: Sat, 21 Mar 2009 05:51:44 GMT
Ref: http://earth-info.nima.mil/GandG/sathtml/satinfo.html
http://earth-info.nima.mil/GandG/sathtml/gpsdoc2009_02a.html
http://gps.afspc.af.mil/gps/Current/current.oa1
The following satellite information is provided by the National Geospatial-Intelligence
Agency (NGA) GPS Division. This information is supplied for all who have an interest in GPS.
For more satellite/station information, see the latest documentation on the NGA GPS Document
Page, _F_e_b_r_u_a_r_y_ _2_0_0_9.
Satellite Freq.
PRN/SVN Plane Std # Block Comments
---------+-------+-----+----------+-------------------------------------------------------------
01/49 ?? Rb? IIR-20/M7 Scheduled launch: Currently TBD...Spring 2009...
02/61 D1 Rb1 IIR Clock swap, 27 April 2008, from Rb3 to Rb1...
03/33 C2 Cs4 IIA
04/34 D4 Rb1 IIA
05/35 B5 Rb1 IIA Next on the possible (?) decommissioning list...
06/36 C5 Rb1 IIA
07/48 A4 Rb3 IIR-19/M6 Launched: 15 March 2008...set healthy 24 March 2008...
08/38 A3 Cs3 IIA
09/39 A1 Cs4 IIA
10/40 E3 Cs3 IIA Clock swap, 25 March 2008, from Rb1 to Cs3...
11/46 D2 Rb1 IIR
12/58 B4 Rb3 IIR-16/M3
13/43 F3 Rb1 IIR
14/41 F1 Rb1 IIR
15/55 F2 Rb3 IIR-17/M4 Launched: 17 October 2007...set healthy 31 October 2007...
16/56 B1 Rb3 IIR
17/53 C4 Rb3 IIR-14/M1
18/54 E4 Rb1 IIR
19/59 C3 Rb3 IIR
20/51 E1 Rb1 IIR
21/45 D3 Rb3 IIR
22/47 E2 Rb3 IIR
23/60 F4 Rb2 IIR
24/24^ D5 Cs4 IIA Placed in AMMM (Mode 5) on 4 January 2005...
25/25 A5 Rb1 IIA Currently in an unhealthy status...
26/26 F5 Rb1 IIA
27/27 A6 Cs4 IIA
28/44 B3 Rb2 IIR
29/57 C1 Rb3 IIR-18/M5 Launched: 20 December 2007...set healthy 2 January 2008...
30/30 B2 Cs3 IIA
31/52 A2 Rb3 IIR-15/M2
32/23 E5 Rb2 IIA Old SVN23/PRN23...Reinstatement on 27 June 2007...
--- note NANU 2007081...set healthy 26 February 2008...
---------+-------+-----+----------+-------------------------------------------------------------
------------------------------------------------------------------------------------------------
Satellite Freq.
PRN/SVN Plane Std # Block
---------+-------+-----+----------+------Recent-Decommissionings--------------------------------
01/32 F6 Cs3 IIA >>>Decommissioned on 17 March 2008<<<
07/37 IIA >>>Decommissioned on 20 December 2007<<<
29/29 IIA >>>Decommissioned on 23 October 2007<<<
15/15 II >>>Decommissioned on 14 March 2007<<<
---------+-------+-----+----------+-Scheduled-Upcoming-Launches---------------------------------
01/49 ?? Rb? IIR-20/M7 Scheduled launch: TBD 2009...Spring 2009...
##/50 ?? Rb? IIR-21/M8 Scheduled launch: TBD 2009...Summer/Fall 2009...
##/62 ?? ??? IIF-1 Scheduled launch: TBD 2009/2010...
---------+-------+-----+----------+------Unfortunate-Happenings---------------------------------
12/42 -- --- IIR Destroyed during Launch (1997)
20/50 -- --- IIR Moisture Seepage at Pre-Launch (1999): Got Wet (DNL)
---------+-------+-----+----------+-------------------------------------------------------------
------------------------------------------------------------------------------------------------
* 3 Wheel Vehicles/Autonomous Momentum Dumps at 0.2 or 0.8 sec.
** Pitch, Roll, P&R at 0.4, 1.6, and 1.6+ sec (manual momentum dumps)
^ AMMM - Autonomous Magnetic Momentum Management (Mode 5)
+ Experiences glint firings prior to and after eclipse season...glint firings are
due to sunlight entering/disorienting sensors causing small thrusts
>##< Satellite having ??serious?? problems...may not be long before non-operational
DNL - Did Not Launch
GLAN - Geographic Longitude of the Ascending Node
UFN - Until Further Notice
NET - No Earlier Than
TBD - To Be Determined
------------------------------------------------------------------------------------------------
For civilian information, contact the United States Coast Guard (NAVCEN) at
(703)313-5900, 24 hours daily, or go to their web-site at:
_h_t_t_p_:_/_/_w_w_w_._n_a_v_c_e_n_._u_s_c_g_._g_o_v
For military information, contact the GPS Support Center, 2SOPS, Schriever Air
Force Base, Colorado, at (719)567-2541 or DSN 560-2541, GPS@xxxxxxxxxxxxxxxxx
------------------------------------------------------------------------------------------------
NATIONAL GEOSPATIAL-INTELLIGENCE AGENCY
GPS PRECISE EPHEMERIDES, SATELLITE CLOCK PARAMETERS
AND SMOOTHED OBSERVATIONS
PRECISE EPHEMERIS
Earth-centered Earth-fixed trajectory
Coordinate system: WGS84 (G1150)
Position -- x,y,z (km)
Velocity -- dx/dt,dy/dt,dz/dt (dm/s)
GPS time -- year, day, hour, minute
Trajectory interval: 15 min.
Standard Trajectory referenced to satellite center of mass
Optional Trajectory referenced to satellite antenna phase center
SATELLITE CLOCK PARAMETERS
Clock parameters for each satellite:
Time offset (microseconds)
Frequency offset (10E-4 microsec/s = parts in 10E10)
Time interval for parameters: 15 min.
Satellite clock events: All events processed as reinitializations
SMOOTHED OBSERVATIONS
Smoothed range and range difference observations (km) with corrections
applied (see below)
GPS time of observation (year, day, seconds from beginning of day)
Standard deviation of observation (km)
Coordinate system: WGS84 (G1150)
Station coordinates: Position -- x,y,z (m), Epoch 2001.0
Velocity -- dx/dt,dy/dt,dz/dt (m/year)
Temperature (degrees Celsius)
Pressure (millibars)
Humidity (percent)
Data interval: 15 min.
Smoothing uses carrier phase to smooth range and range difference
measurements collected at a 1.5 second rate for NGA and Air Force
monitor stations and at a 30 second rate for IGS monitor stations
Minimum elevation angle for observation: 10 degrees
National Geospatial-Intelligence Agency and Air Force monitor station data
collected and smoothed using similar procedures
References: Computer Program Development Spec., Master Control
Station, Ephemeris/Clock Computer Program, NAVSTAR GPS Operational
Control System Segment, CP-MCSEC-302C, Part 1, Appendix A, 7 May 1993.
Description of the Smoothing Algorithm in the NGA Monitor Station
Network, (MSN29), Applied Research Laboratories, The University of
Texas at Austin, GR-SGG-97-1, 3 April 1997.
PHYSICAL CONSTANTS
GM(Earth) = 398600.4418 km**3/s**2
GM(Sun) = 132712400000 km**3/s**2
GM(Moon) = 4902.799186 km**3/s**2
Moon radius = 1738 km
Sun radius = 696000 km
Earth semi-major axis (a) = 6378.137 km
Inverse flattening (1/f) = 298.257223563
Earth angular velocity = 0.72921158553 X 10**-4 Rad/s
Speed of light = 299792.458 km/s
Love's constant = 0.290
Solar constant = 4.560 X 10**-6 N/m**2
Astronomical Unit = 149597870.691 km
STATION COORDINATES (CARTESIAN)
WGS84 (G1150) Epoch 2001.0
ID X (m) Y (m) Z (m)
OLD 85128) -1248597.295 -4819433.239 3976500.175
>> >>NEW 85128) -1248599.616 -4819441.045 3976490.143
85129) 6118524.122 -1572350.853 -876463.990
85130) 1916197.142 6029999.007 -801737.366
85131) -6160884.370 1339851.965 960843.071
OLD 85132) -5511980.484 -2200247.093 2329480.952
>> >>NEW 85132) -5511980.280 -2200247.065 2329480.895<<
85143) 918988.120 -5534552.966 3023721.377
---------------------------------------------------
85402) -3939182.131 3467075.376 -3613220.824
85403) 2745499.065 -4483636.591 -3599054.582
85404) 3981776.642 -89239.095 4965284.650
85405) 3633910.757 4425277.729 2799862.795
85406) 1272867.310 -6252772.219 -23801.818
85407) 1112160.327 -4842854.274 3985496.368
85410) -2296298.460 -1484805.050 5743080.090
OLD 85411) -4780787.068 436877.203 -4185258.942
>> >>NEW 85411) -4780787.718 436877.170 -4185259.709<<
85412) 5066232.133 2719226.969 -2754392.735
85413) -3067861.732 4067639.179 3824294.063
85414) -5246403.866 -3077285.554 -1913839.459
STATION COORDINATES (GEODETIC)
WGS84 (G1150) Epoch 2001.0
ID LAT (deg N) LONG (deg E) ELLIPSOID HT (m)
OLD 85128) 38.80305456 255.47540844 1911.755
>> >>NEW 85128) 38.80293823 255.47540511 1911.811
85129) -7.95132970 345.58786950 106.558
85130) -7.26984347 72.37092177 -64.063
85131) 8.72250074 167.73052625 39.927
OLD 85132) 21.56149086 201.76066922 426.077
>> >>NEW 85132) 21.56149104 201.76066970 425.870
85143) 28.48373800 279.42769549 -24.005
---------------------------------------------------
85402) -34.72900041 138.64734499 38.155
85403) -34.57370168 301.48070059 48.747
85404) 51.45374284 358.71610888 163.097
85405) 26.20914020 50.60814451 -13.872
85406) -.21515762 281.50639169 2922.626
85407) 38.92056568 282.93370406 57.872
85410) 64.68794025 212.88703366 176.570
OLD 85411) -41.27264851 174.77870673 46.902
>> >>NEW 85411) -41.27264988 174.77870783 47.892<<
85412) -25.74634609 28.22403736 1416.405
85413) 37.07756793 127.02403180 48.876
85414) -17.57703053 210.39381438 99.927
CORRECTIONS APPLIED TO MEASUREMENTS
Ionospheric delay: 2-frequency, 1st order correction
Tropospheric refraction: Saastamoinen hydrostatic and wet zenith delay
models and Niell hydrostatic and wet mapping functions
Periodic relativistic effects
Satellite antenna offset (satellite body centered coordinates, meters)
Block II PRN's - Delta x= 0.2794, Delta y= 0.0000, Delta z= 0.9519
Block IIA PRN's - Delta x= 0.2794, Delta y= 0.0000, Delta z= 0.9519
Block IIR PRN 02 - Delta x= -0.0099, Delta y= 0.0061, Delta z= -0.0820
Block IIR PRN 11 - Delta x= 0.0019, Delta y= 0.0011, Delta z= 1.5141
Block IIR PRN 13 - Delta x= 0.0024, Delta y= 0.0025, Delta z= 1.6140
Block IIR PRN 14 - Delta x= 0.0018, Delta y= 0.0002, Delta z= 1.6137
Block IIR PRN 16 - Delta x= -0.0098, Delta y= 0.0060, Delta z= 1.6630
Block IIR PRN 18 - Delta x= -0.0098, Delta y= 0.0060, Delta z= 1.5923
Block IIR PRN 19 - Delta x= -0.0079, Delta y= 0.0046, Delta z= -0.0180
Block IIR PRN 20 - Delta x= 0.0022, Delta y= 0.0014, Delta z= 1.6140
Block IIR PRN 21 - Delta x= 0.0023, Delta y= -0.0006, Delta z= 1.5840
Block IIR PRN 22 - Delta x= 0.0018, Delta y= -0.0009, Delta z= 0.0598
Block IIR PRN 23 - Delta x= -0.0088, Delta y= 0.0035, Delta z= 0.0004
Block IIR PRN 28 - Delta x= 0.0019, Delta y= 0.0007, Delta z= 1.5131
Block IIR-M PRN 07 - Delta x= 0.00127, Delta y= 0.00025, Delta z= 0.00056
Block IIR-M PRN 12 - Delta x= -0.01016, Delta y= 0.00587, Delta z= -0.09355
Block IIR-M PRN 15 - Delta x= -0.00996, Delta y= 0.00579, Delta z= -0.01227
Block IIR-M PRN 17 - Delta x= -0.00996, Delta y= 0.00599, Delta z= -0.10060
Block IIR-M PRN 29 - Delta x= -0.01012, Delta y= 0.00591, Delta z= -0.01512
Block IIR-M PRN 31 - Delta x= 0.00160, Delta y= 0.00033, Delta z= -0.05750
Station displacement due to tides
Yaw Bias: JPL yaw bias model for Block II and IIA satellites in eclipse
FORCE MODELING
Gravitational:
EGM96 Earth gravity model truncated at degree 12 and order 12
Solar and Lunar gravity using the DE403 ephemeredes, J2000 epoch,
and IAU Resolutions on Astronomical Constants, Time Scales, and
the Fundamental Reference Frame (1976-1980)
Solid Earth tides
Non-gravitational:
Radiation Pressure
The JPL TJPLXYZ03-II/IIA version model for Block II and IIA satellites
The JPL TJPLXYZ03-IIR version model for Block IIR satellites
Thrusts
Momentum dumps
Kinematic:
Luni-solar and planetary precession (IAU Resolutions, as above)
Nutation (IAU Resolutions, as above)
Earth rotation (IAU Resolutions, as above)
Polar Motion (using NGA initial values generated the week before
the orbit fit) + diurnal and semi-diurnal effects
UT1-UTC (using NGA initial values generated the week before the
orbit fit) + Zonal tide effects + diurnal and semi-diurnal effects
Integration step size: 300 seconds, reduced to 10 seconds during
eclipse boundary crossings
ORBIT ESTIMATION METHOD
Kalman Filter/RTS Smoother (Square Root Information implementation)
Initial conditions: From previous fit
Solution parameters:
Satellite state vector in element form at trajectory epoch --
semi-major axis
eccentricity * sin(argument of perigee)
eccentricity * cos(argument of perigee)
inclination
mean anomaly + argument of perigee
right ascension of the ascending node
Satellite clock parameters -- Time offset, Frequency offset
Monitor station clock parameters (excluding master station) --
Time offset, Frequency offset
Polar motion parameters -- Pole and pole rate components along
Greenwich meridian, Pole and pole rate components along
meridian 90 deg west of Greenwich, Rate of change and
acceleration of UT1-UTC
Satellite radiation pressure parameters -- Radiation pressure
scale, and Y-axis acceleration
Tropospheric refraction -- One stochastic zenith delay
parameter per station
Minimum range observation uncertainty(1-sigma):100 cm (IGS Stations)
80 cm (AF Station 85130)
40 cm (Other AF and NGA stations)
Minimum range difference observation uncertainty (1-sigma): 1.5 cm
Process noise in Kalman Filter:
Radiation pressure (each satellite)--
Decorrelation time 14,400 s
Steady state sigmas --
SCALE 0.05
Y-AXIS 0.5 X 10**-12 km/s**2
Tropospheric refraction variance rate: 2.89 cm**2/hr
Station clock white noise spectral density: (each station) --
Time offset 0.1111 X 10**-2 (microseconds)**2/s
Frequency offset 0.1111 X 10**-8 (ppm)**2/s
Satellite clock white noise spectral density: (each satellite)
Time offset 0.1111 X 10**-2 (microseconds)**2/s
Frequency offset 0.1111 X 10**-8 (ppm)**2/s
Frequency drift 0. (ppm/s)**2/s
SATELLITE CLOCK ESTIMATION METHOD
Kalman Filter/RTS Smoother (Square Root Information implementation)
Orbit solutions from above method are held fixed for satellite clock
estimation
Solution parameters:
Satellite clock parameters -- Time offset, Frequency offset
Monitor station clock parameters (excluding master station) --
Time offset, Frequency offset
Tropospheric refraction -- One stochastic zenith delay parameter
per station.
Minimum range observation uncertainty(1-sigma):100 cm (IGS Stations)
80 cm (AF Station 85130)
40 cm (Other AF and NGA stations)
Minimum range difference observation uncertainty (1-sigma): 15.0 cm
Process noise in Kalman Filter:
Tropospheric refraction variance rate: 2.89 cm**2/hr
Station clock white noise spectral densities:
NGA stations (except USNO) and Air Force stations (except Colorado Springs):
Time offset 0.1944 X 10**-8 (microseconds)**2/s
Frequency offset 0.4440 X 10**-19 (ppm)**2/s
NGA station at USNO and Air Force station at Colorado Springs:
Time offset 0.1380 X 10**-9 (microseconds)**2/s
Frequency offset 0.4440 X 10**-19 (ppm)**2/s
IGS stations:
Time offset 0.3456 X 10**-8 (microseconds)**2/s
Frequency offset 0.4440 X 10**-19 (ppm)**2/s
Satellite clock white noise spectral densities:
Satellite Block IIR Rubidium clocks
Time offset 0.8640 X 10**-9 (microseconds)**2/s
Frequency offset 0.1110 X 10**-18 (ppm)**2/s
Frequency drift 0. (ppm/s)**2/s
Satellite Block II/IIA Rubidium clocks
Time offset 0.1944 X 10**-8 (microseconds)**2/s
Frequency offset 0.1110 X 10**-18 (ppm)**2/s
Frequency drift 0. (ppm/s)**2/s
Satellite Cesium clocks
Time offset 0.13824 X 10**-7 (microseconds)**2/s
Frequency offset 0.1000 X 10**-17 (ppm)**2/s
Frequency drift 0. (ppm/s)**2/s
Satellite 'Noisy' Cesium clocks
Time offset 0.2000 X 10**-7 (microseconds)**2/s
Frequency offset 0.1110 X 10**-16 (ppm)**2/s
Frequency drift 0. (ppm/s)**2/s
Reference: Swift, E., Mathematical Description of the GPS Multi-Satellite
Filter/Smoother, NSWCDD Report (Oct. 2001).
UNCLASSIFIED
GPS OPERATIONAL ADVISORY 079.OA1
SUBJ: GPS STATUS 20 MAR 2009
1. SATELLITES, PLANES, AND CLOCKS (CS=CESIUM RB=RUBIDIUM):
A. BLOCK I : NONE
B. BLOCK II: PRNS 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
PLANE : SLOT D1, C2, D4, B5, C5, A6, A3, A1, E3, D2, B4, F3, F1, F2
CLOCK : RB, CS, RB, RB, RB, RB, CS, CS, CS, RB, RB, RB, RB, RB
BLOCK II: PRNS 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
PLANE : SLOT B1, C4, E4, C3, E1, D3, E2, F4, D5, A5, F5, A4, B3, C1
CLOCK : RB, RB, RB, RB, RB, RB, RB, RB, CS, RB, RB, CS, RB, RB
BLOCK II: PRNS 30, 31, 32
PLANE : SLOT B2, A2, E5
CLOCK : CS, RB, RB
2. CURRENT ADVISORIES AND FORECASTS :
A. FORECASTS: FOR SEVEN DAYS AFTER EVENT CONCLUDES.
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)
2009009 172107Z FEB 2009 27 FCSTMX 057/0400-057/1600
2009010 172117Z FEB 2009 04 FCSTMX 058/0330-058/1530
2009011 182142Z FEB 2009 04 FCSTRESCD 062/0330-062/1530
2009012 202133Z FEB 2009 26 FCSTDV 057/1730-058/1930
2009015 260602Z FEB 2009 27 FCSTSUMM 057/0432-057/0544
2009016 270438Z FEB 2009 26 FCSTSUMM 057/1745-058/0408
2009017 272356Z FEB 2009 10 FCSTDV 065/0730-065/2145
2009018 030952Z MAR 2009 04 FCSTSUMM 062/0355-062/0945
2009019 061320Z MAR 2009 10 FCSTSUMM 065/0737-065/1321
B. ADVISORIES:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)
C. GENERAL:
NANU MSG DATE/TIME PRN TYPE SUMMARY (JDAY/ZULU TIME START - STOP)
2009020 202158Z MAR 2009 GENERAL /-/
3. REMARKS:
A. THE POINT OF CONTACT FOR GPS MILITARY OPERATIONAL SUPPORT IS THE GPS
OPERATIONS CENTER AT (719)567-2541 OR DSN 560-2541.
B. CIVILIAN: FOR INFORMATION, CONTACT US COAST GUARD NAVCEN AT
COMMERCIAL (703)313-5900 24 HOURS DAILY AND INTERNET
HTTP://WWW.NAVCEN.USCG.GOV
C. MILITARY SUPPORT WEBPAGES CAN BE FOUND AT THE FOLLOWING
HTTPS://GPS.AFSPC.AF.MIL/GPS
.
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