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https://github.com/gnss-sdr/gnss-sdr
synced 2024-12-13 19:50:34 +00:00
58 lines
3.5 KiB
Protocol Buffer
58 lines
3.5 KiB
Protocol Buffer
// SPDX-License-Identifier: BSD-3-Clause
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// SPDX-FileCopyrightText: 2018-2021 Carles Fernandez-Prades <carles.fernandez@cttc.es>
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syntax = "proto3";
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package gnss_sdr;
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message GpsEphemeris {
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int32 PRN = 1; // SV ID
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double M_0 = 2; // Mean anomaly at reference time [rad]
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double delta_n = 3; // Mean motion difference from computed value [rad/sec]
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double ecc = 4; // Eccentricity
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double sqrtA = 5; // Square root of the semi-major axis [meters^1/2]
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double OMEGA_0 = 6; // Longitude of ascending node of orbital plane at weekly epoch [rad]
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double i_0 = 7; // Inclination angle at reference time [rad]
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double omega = 8; // Argument of perigee [rad]
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double OMEGAdot = 9; // Rate of right ascension [rad/sec]
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double idot = 10; // Rate of inclination angle [rad/sec]
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double Cuc = 11; // Amplitude of the cosine harmonic correction term to the argument of latitude [rad]
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double Cus = 12; // Amplitude of the sine harmonic correction term to the argument of latitude [rad]
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double Crc = 13; // Amplitude of the cosine harmonic correction term to the orbit radius [meters]
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double Crs = 14; // Amplitude of the sine harmonic correction term to the orbit radius [meters]
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double Cic = 15; // Amplitude of the cosine harmonic correction term to the angle of inclination [rad]
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double Cis = 16; // Amplitude of the sine harmonic correction term to the angle of inclination [rad]
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int32 toe = 17; // Ephemeris reference time [s]
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// Clock correction parameters
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int32 toc = 18; // Clock correction data reference Time of Week [sec]
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double af0 = 19; // SV clock bias correction coefficient [s]
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double af1 = 20; // SV clock drift correction coefficient [s/s]
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double af2 = 21; // SV clock drift rate correction coefficient [s/s^2]
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double satClkDrift = 22; // SV clock drift
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double dtr = 23; // Relativistic clock correction term
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// Time
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int32 WN = 24; // Week number
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int32 tow = 25; // Time of Week
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// GPS-specific parameters
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int32 code_on_L2 = 26; // If 1, P code ON in L2; if 2, C/A code ON in L2;
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bool L2_P_data_flag = 27; // When true, indicates that the NAV data stream was commanded OFF on the P-code of the L2 channel
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int32 SV_accuracy = 28; // User Range Accuracy (URA) index of the SV (reference paragraph 6.2.1) for the standard positioning service user (Ref 20.3.3.3.1.3 IS-GPS-200M)
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int32 SV_health = 29; // Satellite heath status
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double TGD = 30; // Estimated Group Delay Differential: L1-L2 correction term only for the benefit of "L1 P(Y)" or "L2 P(Y)" s users [s]
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int32 IODC = 31; // Issue of Data, Clock
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int32 IODE_SF2 = 32; // Issue of Data, Ephemeris (IODE), subframe 2
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int32 IODE_SF3 = 33; // Issue of Data, Ephemeris (IODE), subframe 3
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int32 AODO = 34; // Age of Data Offset (AODO) term for the navigation message correction table (NMCT) contained in subframe 4 (reference paragraph 20.3.3.5.1.9) [s]
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bool fit_interval_flag = 35; // indicates the curve-fit interval used by the CS (Block II/IIA/IIR/IIR-M/IIF) and SS (Block IIIA) in determining the ephemeris parameters, as follows: 0 = 4 hours, 1 = greater than 4 hours.
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double spare1 = 36;
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double spare2 = 37;
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bool integrity_status_flag = 38;
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bool alert_flag = 39; // If true, indicates that the SV URA may be worse than indicated in d_SV_accuracy, use that SV at our own risk.
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bool antispoofing_flag = 40; // If true, the AntiSpoofing mode is ON in that SV
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}
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