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Sam Wormley
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On 7/16/11 7:45 AM, Sam Wormley wrote:
> The second GPS Block IIF satellite launched successfully from Cape > Canaveral at 2:41 a.m. EDT on July 16 and has reached transfer orbit. > > After two postponements, this was the first GPS launch since the May 27, > 2010, flight of GPS IIF-1. > 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, July 2011. > > > Satellite Freq. > PRN/SVN Plane Std # Block Comments > ---------+-------+-----+----------+------------------------------------------------------------- > 01/63 D2 ??? IIF-2 Launched: 16 July 2011... > --- > 02/61 D1 Rb1 IIR Clock swap, 27 April 2008, from Rb3 to Rb1... > 03/33 C2 Cs4 IIA > 04/34 D4 Rb1 IIA > 05/50 E3 Rb1 IIR-21/M8 Launched: 17 August 2009...set healthy 27 August 2009... > 06/36 C5 Rb1 IIA > 07/48 A4 Rb3 IIR-19/M6 > 08/38 A3 Rb1 IIA Clock swap, 15 October 2009, from Cs3 to Rb1... > --- Clock swap, 16 November 2009, from Rb1 to Cs4... > 09/39 A1 Cs4 IIA > 10/40 E3 Cs3 IIA Will be moving eastward from E3 slot to make room > --- for PRN/SVN 05/50... > 11/46 D2(F) 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 > 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... > 25/62 B2 Rb1 IIF-1 Launched 28 May 2010...Clock swap, 12 July 2010, > --- from Cs3 to Rb1...Set healthy 27 August 2010... > 26/26 F5 Rb1 IIA > 27/27 A6 Cs4 IIA > 28/44 B3 Rb2 IIR > 29/57 C1 Rb3 IIR-18/M5 > 30/30 B5 Cs3 IIA > 31/52 A2 Rb3 IIR-15/M2 > 32/23 E5 Rb2 IIA Old PRN23/SVN23...Reinstatement on 27 June 2007... > > ---------+-------+-----+----------+------------------------------------------------------------- > ------------------------------------------------------------------------------------------------ > > Satellite Freq. > PRN/SVN Plane Std # Block > ---------+-------+-----+----------+-Scheduled-Upcoming-Launches--------------------------------- > 01/63 D2 ??? IIF-2 Scheduled launch: 14 July 2011... > > > ---------+-------+-----+----------+------Recent-Decommissionings-------------------------------- > 01/35 B5 RB1 IIA >>>No more L-Band as of 12 July 2011<<< > --- ---should be re-decommissioned--- > 01/49 B6 Rb2 IIR-20/M7 >>>Decommissioned on 06 May 2011<<< > 25/35 B5 Rb1 IIA >>>Decommissioned on 01 March 2010<<< > 25/25 A5 Rb1 IIA >>>Decommissioned on 18 December 2009<<< > 05/35 B5 Rb1 IIA >>>Decommissioned on 26 March 2009<<< > > ---------+-------+-----+----------+------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: > http://www.navcen.uscg.gov > For military information, contact the GPS Support Center, 2SOPS, Schriever Air > Force Base, Colorado, at (719)567-2541 or DSN 560-2541, (E-Mail Removed). > ------------------------------------------------------------------------------------------------ > 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 > COORDINATES ARE IN METERS > VELOCITIES ARE IN METERS/YEAR > > ID X (m) Y (m) Z (m) > 85128) AMC1 -1248599.616 -4819441.045 3976490.143 > -.0179 .0010 -.0037 > 85129) ASCN 6118523.959 -1572350.788 -876463.966 > -.0025 -.0048 .0102 > 85130) DGAR 1916197.038 6029998.760 -801737.324 > -.0422 .0203 .0307 > 85131) KWGL -6160884.189 1339851.890 960843.048 > .0207 .0673 .0270 > 85132) HAWI -5511980.267 -2200247.059 2329480.888 > -.0095 .0630 .0298 > 85143) CAPE 918988.120 -5534552.966 3023721.377 > -.0102 -.0015 .0015 > -------------------------------------------------- > 85402) AUSA -3939182.131 3467075.376 -3613220.824 > -.0408 .0036 .0473 > 85403) ARGA 2745499.065 -4483636.591 -3599054.582 > .0021 -.0100 .0070 > 85404) ENGD 3981776.643 -89239.097 4965284.672 > -.0138 .0165 .0077 > 85405) BAH1 3633910.240 4425277.144 2799862.420 > -.0297 .0091 .0253 > 85406) ECUA 1272867.329 -6252772.124 -23801.818 > .0030 .0004 .0099 > 85407) USNO 1112158.931 -4842855.601 3985497.054 > -.0148 -.0001 .0010 > 85410) ALAS -2296298.464 -1484805.073 5743080.055 > -.0222 -.0036 -.0092 > 85411) NZLD -4780787.718 436877.170 -4185259.709 > -.0235 .0192 .0220 > 85412) SAFR 5066232.114 2719226.950 -2754392.726 > .0001 .0209 .0140 > 85413) SKOR -3067863.123 4067641.035 3824295.830 > -.0290 -.0076 -.0102 > 85414) TAHI -5246403.866 -3077285.554 -1913839.459 > -.0425 .0468 .0291 > > > STATION COORDINATES (GEODETIC) > WGS84 (G1150) Epoch 2001.0 > > ID LAT (deg N) LONG (deg E) ELLIPSOID HT (m) > > 85128) 38.80293823 255.47540511 1911.811 > 85129) -7.95132970 345.58786971 106.382 > 85130) -7.26984340 72.37092199 -64.333 > 85131) 8.72250080 167.73052657 39.733 > 85132) 21.56149103 201.76066969 425.854 > 85143) 28.48373800 279.42769549 -24.005 > -------------------------------------------------- > 85402) -34.72900041 138.64734499 38.155 > 85403) -34.57370168 301.48070059 48.747 > 85404) 51.45374296 358.71610885 163.115 > 85405) 26.20914027 50.60814480 -14.738 > 85406) -.21515762 281.50639203 2922.537 > 85407) 38.92056494 282.93368495 59.066 > 85410) 64.68793999 212.88703402 176.545 > 85411) -41.27264988 174.77870783 47.892 > 85412) -25.74634613 28.22403728 1416.378 > 85413) 37.07756804 127.02403172 51.792 > 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 01 - Delta x= 0.01245, Delta y= -0.00038, Delta z= -0.02283 > Block IIR-M PRN 05 - Delta x= 0.00292, Delta y= -0.00005, Delta z= -0.01671 > 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 > --- > Block IIF PRN 25 - Delta x= 0.39200, Delta y= 0.00200, Delta z= 1.09300 > Block IIF PRN 01 - Delta x= 0.39100, Delta y= 0.00000, Delta z= 1.09100 > --- > > > 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 > The ?????? - IIF version model for Block IIF 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/IIF 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). > > > > > |
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