GPS Satellite Ephemeris and Clock Data Samples

04/20/95

Peter H. Dana

Department of Geography, University of Texas at Austin

Send mail to: pdana@mail.utexas.edu

GPS Satellite Ephemeris and Clock Parameters

Decoded from Subframes 1, 2, and 3 of GPS Data Bit Frames

Gathered 4/18/95 21:36:00

Austron 2201A GPS Satellite Receiver

Courtesy of:

Austron, Inc. a Datum Company

P. O. Box 14766

Austin, Texas 78761

(512) 251-2313


EPHEMERIS FOR SATELLITE 2 :

PRN number for data .................. 2

Issue of ephemeris data .............. 224

Semi-Major Axis (meters) ............. 2.65603E+07

C(ic) (rad) .......................... 1.88127E-07

C(is) (rad) .......................... -1.00583E-07

C(rc) (meters) ....................... 321.656

C(rs) (meters) ....................... 87.6875

C(uc) (rad) .......................... 4.36418E-06

C(us) (rad) .......................... 2.70829E-06

Mean motion difference (rad/sec) ..... 5.04521E-09

Eccentricity (dimensionless) ......... 0.0139305

Rate of inclination angle (rad/sec) .. 4.11089E-10

Inclination angle @ ref. time (rad) .. 0.950462

Mean Anomaly at reference time (rad) . -2.62555

Corrected Mean Motion (rad/sec) ...... 0.000145859

Computed Mean Motion (rad/sec) ....... 0.000145854

Argument of perigee (rad) ............ -2.56865

Rate of right ascension (rad/sec) .... -8.43857E-09

Right ascension @ ref time (rad) ..... 1.75048

Sqrt (1 - e^2) ....................... 0.999903

Sqr root semi-major axis, (m^1/2) .... 5153.67

Reference time ephemeris (sec) ....... 240704

CLOCK FOR SATELLITE 2 :

PRN number for data ......... 2

Week number...... ........... 797

Predicted user range accuracy 32

Health of satellite ......... 0

L1 - L2 Correction term ..... 9.31323E-10

Issue of clock data ......... 224

Time of clock data .......... 240704

Clock offset ................ -0.000158074

Clock drift ................. -2.50111E-12

Rate of clock drift ......... 0

EPHEMERIS FOR SATELLITE 4 :

PRN number for data .................. 4

Issue of ephemeris data .............. 157

Semi-Major Axis (meters) ............. 2.65616E+07

C(ic) (rad) .......................... 3.72529E-08

C(is) (rad) .......................... -5.96046E-08

C(rc) (meters) ....................... 175.406

C(rs) (meters) ....................... -60.2188

C(uc) (rad) .......................... -3.33972E-06

C(us) (rad) .......................... 1.06301E-05

Mean motion difference (rad/sec) ..... 4.1616E-09

Eccentricity (dimensionless) ......... 0.00354898

Rate of inclination angle (rad/sec) .. 7.64318E-11

Inclination angle @ ref. time (rad) .. 0.96687

Mean Anomaly at reference time (rad) . 1.41596

Corrected Mean Motion (rad/sec) ...... 0.000145848

Computed Mean Motion (rad/sec) ....... 0.000145844

Argument of perigee (rad) ............ -1.14906

Rate of right ascension (rad/sec) .... -7.79854E-09

Right ascension @ ref time (rad) ..... -2.39929

Sqrt (1 - e^2) ....................... 0.999994

Sqr root semi-major axis, (m^1/2) .... 5153.79

Reference time ephemeris (sec) ....... 252000

CLOCK FOR SATELLITE 4 :

PRN number for data ......... 4

Week number...... ........... 797

Predicted user range accuracy 32

Health of satellite ......... 0

L1 - L2 Correction term ..... 1.39698E-09

Issue of clock data ......... 669

Time of clock data .......... 252000

Clock offset ................ 2.19094E-05

Clock drift ................. 1.81899E-12

Rate of clock drift ......... 0

EPHEMERIS FOR SATELLITE 7 :

PRN number for data .................. 7

Issue of ephemeris data .............. 5

Semi-Major Axis (meters) ............. 2.656E+07

C(ic) (rad) .......................... 1.91852E-07

C(is) (rad) .......................... -1.08033E-07

C(rc) (meters) ....................... 300.719

C(rs) (meters) ....................... -94.0938

C(uc) (rad) .......................... -4.81494E-06

C(us) (rad) .......................... 4.06802E-06

Mean motion difference (rad/sec) ..... 4.6902E-09

Eccentricity (dimensionless) ......... 0.00693839

Rate of inclination angle (rad/sec) .. -1.53578E-10

Inclination angle @ ref. time (rad) .. 0.964094

Mean Anomaly at reference time (rad) . -2.73317

Corrected Mean Motion (rad/sec) ...... 0.000145862

Computed Mean Motion (rad/sec) ....... 0.000145857

Argument of perigee (rad) ............ -2.56914

Rate of right ascension (rad/sec) .... -8.3357E-09

Right ascension @ ref time (rad) ..... 2.81765

Sqrt (1 - e^2) ....................... 0.999976

Sqr root semi-major axis, (m^1/2) .... 5153.63

Reference time ephemeris (sec) ....... 247904

CLOCK FOR SATELLITE 7 :

PRN number for data ......... 7

Week number...... ........... 797

Predicted user range accuracy 32

Health of satellite ......... 0

L1 - L2 Correction term ..... 1.39698E-09

Issue of clock data ......... 5

Time of clock data .......... 247904

Clock offset ................ 0.000703468

Clock drift ................. 2.27374E-13

Rate of clock drift ......... 0

EPHEMERIS FOR SATELLITE 12 :

PRN number for data .................. 12

Issue of ephemeris data .............. 52

Semi-Major Axis (meters) ............. 2.65577E+07

C(ic) (rad) .......................... -2.10479E-07

C(is) (rad) .......................... 9.12696E-08

C(rc) (meters) ....................... 246.875

C(rs) (meters) ....................... 112.5

C(uc) (rad) .......................... 5.89341E-06

C(us) (rad) .......................... 9.87016E-06

Mean motion difference (rad/sec) ..... 1.56721E-09

Eccentricity (dimensionless) ......... 0.0154782

Rate of inclination angle (rad/sec) .. 2.91441E-10

Inclination angle @ ref. time (rad) .. 1.08541

Mean Anomaly at reference time (rad) . 2.79641

Corrected Mean Motion (rad/sec) ...... 0.000145878

Computed Mean Motion (rad/sec) ....... 0.000145876

Argument of perigee (rad) ............ -0.0994882

Rate of right ascension (rad/sec) .... -6.41491E-09

Right ascension @ ref time (rad) ..... 1.12752

Sqrt (1 - e^2) ....................... 0.99988

Sqr root semi-major axis, (m^1/2) .... 5153.41

Reference time ephemeris (sec) ....... 255600

CLOCK FOR SATELLITE 12 :

PRN number for data ......... 12

Week number...... ........... 797

Predicted user range accuracy 2.8

Health of satellite ......... 0

L1 - L2 Correction term ..... 2.79397E-09

Issue of clock data ......... 52

Time of clock data .......... 255600

Clock offset ................ -0.000519538

Clock drift ................. -3.5584E-11

Rate of clock drift ......... 0

EPHEMERIS FOR SATELLITE 15 :

PRN number for data .................. 15

Issue of ephemeris data .............. 16

Semi-Major Axis (meters) ............. 2.65598E+07

C(ic) (rad) .......................... -8.00937E-08

C(is) (rad) .......................... 1.86265E-09

C(rc) (meters) ....................... 171.938

C(rs) (meters) ....................... -56.0312

C(uc) (rad) .......................... -2.87965E-06

C(us) (rad) .......................... 1.09263E-05

Mean motion difference (rad/sec) ..... 4.1266E-09

Eccentricity (dimensionless) ......... 0.00671411

Rate of inclination angle (rad/sec) .. 1.63578E-10

Inclination angle @ ref. time (rad) .. 0.971519

Mean Anomaly at reference time (rad) . -0.820821

Corrected Mean Motion (rad/sec) ...... 0.000145862

Computed Mean Motion (rad/sec) ....... 0.000145858

Argument of perigee (rad) ............ 1.74644

Rate of right ascension (rad/sec) .... -7.9014E-09

Right ascension @ ref time (rad) ..... -2.3653

Sqrt (1 - e^2) ....................... 0.999977

Sqr root semi-major axis, (m^1/2) .... 5153.62

Reference time ephemeris (sec) ....... 244800

CLOCK FOR SATELLITE 15 :

PRN number for data ......... 15

Week number...... ........... 797

Predicted user range accuracy 4

Health of satellite ......... 0

L1 - L2 Correction term ..... 2.79397E-09

Issue of clock data ......... 16

Time of clock data .......... 244800

Clock offset ................ 0.000178255

Clock drift ................. 3.41061E-12

Rate of clock drift ......... 0

EPHEMERIS FOR SATELLITE 24 :

PRN number for data .................. 24

Issue of ephemeris data .............. 179

Semi-Major Axis (meters) ............. 2.65599E+07

C(ic) (rad) .......................... -1.02445E-07

C(is) (rad) .......................... -1.22935E-07

C(rc) (meters) ....................... 168.656

C(rs) (meters) ....................... -63.3125

C(uc) (rad) .......................... -3.48687E-06

C(us) (rad) .......................... 1.1526E-05

Mean motion difference (rad/sec) ..... 3.94802E-09

Eccentricity (dimensionless) ......... 0.00623617

Rate of inclination angle (rad/sec) .. 1.05004E-10

Inclination angle @ ref. time (rad) .. 0.976756

Mean Anomaly at reference time (rad) . 1.79689

Corrected Mean Motion (rad/sec) ...... 0.000145861

Computed Mean Motion (rad/sec) ....... 0.000145858

Argument of perigee (rad) ............ -2.06498

Rate of right ascension (rad/sec) .... -7.67032E-09

Right ascension @ ref time (rad) ..... -2.4059

Sqrt (1 - e^2) ....................... 0.999981

Sqr root semi-major axis, (m^1/2) .... 5153.63

Reference time ephemeris (sec) ....... 252000

CLOCK FOR SATELLITE 24 :

PRN number for data ......... 24

Week number...... ........... 797

Predicted user range accuracy 32

Health of satellite ......... 0

L1 - L2 Correction term ..... 6.0536E-09

Issue of clock data ......... 435

Time of clock data .......... 252000

Clock offset ................ 0.000693584

Clock drift ................. 3.50155E-11

Rate of clock drift ......... 0

EPHEMERIS FOR SATELLITE 27 :

PRN number for data .................. 27

Issue of ephemeris data .............. 158

Semi-Major Axis (meters) ............. 2.65602E+07

C(ic) (rad) .......................... 2.66358E-07

C(is) (rad) .......................... 1.73226E-07

C(rc) (meters) ....................... 160.781

C(rs) (meters) ....................... 63.2188

C(uc) (rad) .......................... 3.40119E-06

C(us) (rad) .......................... 1.08313E-05

Mean motion difference (rad/sec) ..... 4.54662E-09

Eccentricity (dimensionless) ......... 0.0112431

Rate of inclination angle (rad/sec) .. -7.39317E-11

Inclination angle @ ref. time (rad) .. 0.945988

Mean Anomaly at reference time (rad) . 1.27438

Corrected Mean Motion (rad/sec) ...... 0.00014586

Computed Mean Motion (rad/sec) ....... 0.000145855

Argument of perigee (rad) ............ 2.57836

Rate of right ascension (rad/sec) .... -7.94747E-09

Right ascension @ ref time (rad) ..... 0.720816

Sqrt (1 - e^2) ....................... 0.999937

Sqr root semi-major axis, (m^1/2) .... 5153.66

Reference time ephemeris (sec) ....... 252000

CLOCK FOR SATELLITE 27 :

PRN number for data ......... 27

Week number...... ........... 797

Predicted user range accuracy 32

Health of satellite ......... 0

L1 - L2 Correction term ..... 1.39698E-09

Issue of clock data ......... 157

Time of clock data .......... 240704

Clock offset ................ 2.7555E-05

Clock drift ................. 1.25056E-12

Rate of clock drift ......... 0