MGEX
Satellite Metadata SINEX Format

Satellite metadata are grouped in different blocks of the SINEX format:

Name Description
SATELLITE/IDENTIFIER Satellite designations (static)
SATELLITE/PRN PRN assignment
SATELLITE/FREQUENCY_CHANNEL GLONASS frequency channel
SATELLITE/MASS Spacecraft mass
SATELLITE/CENTER_OF_MASS Center-of-mass position
SATELLITE/ECCENTRICITY Equipment positions
SATELLITE/TX_POWER Transmit power

The space vehicle number (SVN) is used as primary key for specification of satellite metadata. Validity intervals are provided for time varying data including half-open intervals [tstart,tend[ and constant parameter values in each interval (no slopes). Like in the bias SINEX format, four digit years for time stamps are used. The comment field offers improved traceability and the FILE/COMMENT block is used for references and background information.


Satellite Identifier

The SATELLITE/IDENTIFIER block contains only unique information that does not require a validity interval. It supersedes the existing SATELLITE/ID block: the time-dependent PRN assignment has been moved to the new SATELLITE/PRN block, Satellite Catalog Numbers (aka NORAD-ID) and a comment field have been added, and new block names have been defined (old block names denote ANTEX antenna type!). The comment field contains the launch date and common name of the satellite if available.



Satellite PRN Assignment

The SATELLITE/PRN block supersedes the existing SATELLITE/ID block. It only contains the mapping between pseudo-random noise (PRN) number and space vehicle number (SVN).



GLONASS Frequency Channel

The SATELLITE/FREQUENCY_CHANNEL block provides the mapping between SVN and frequency channels of the GLONASS frequency devision multiple access (FDMA) technology.



Satellite Mass

A mass history is currently provided for selected Galileo and all QZSS satellites.



Satellite Center of Mass

The values refer to agreed-upon origin (e.g., origin of mechanical reference system defined by manufacturer). The use of zero values if no CoM location is available is possible but deprecated.



Satellite Eccentricity

The SATELLITE/ECCENTRICITY block provides equipment locations for use in measurement modeling (antennas, retro-reflectors, etc.). The values refer to an agreed-upon origin (e.g., origin of mechanical reference system defined by manufacturer) and IGS conventions for orientation of spacecraft body axes. The same origin applies for all devices and the center-of-mass of a given satellite. Users and providers are responsible to ensure the consistency of SATELLITE/ECCENTRICITY and SATELLITE/COM blocks.

Old and new PCO concept

Current ANTEX conventions imply the use of the center-of-mass as “reference point” for GNSS antennas (old in the above figure). This convention must be retained for SINEX up to the release of new ANTEX format. The definition of block-specific antenna reference points is encouraged for all GNSSs (new in the above figure). These are already available for Galileo IOV and FOC. The GNSS antenna names in the current IGS metadata SINEX file must match those in rcv_ant.tab for consistency with the current ANTEX file. New names should be defined when transitioning to mechanically defined antenna reference points. A list of old and new GNSS device names is given below. CAVE: Antenna names are different from block names! In version 1.4 of the ANTEX format, there are no entries for multiple L-band antennas as already employed on, e.g. GLO-K1 (R801) and QZSS.

Current (ANTEX 1.4 compatible)

Future (antenna and LRA reference points)

The technique-specific observation type indicator (T) is P for GNSS and L for SLR. Current SLR eccentricities refer to the “phase center”. This has to be replaced by the reference point for use with nadir-angle dependent range correction.

Satellite Transmit Power

Satellite transmit power is needed for the computation of antenna thrust. The trasmit power values for QZSS are provided by the manufacturer, whereas the other values originate from high-gain antenna measurements.



Block and Device Names

GNSS block and device names

The old GNSS device names are compatible whith the current ANTEX file. New device names are proposed along with a new version of the ANTEX format to support multiple GNSS antennas on a single GNSS satellite like GLO_K1A and the different QZSS satellites.

Block Device Name Device Name Description
GNSS old GNSS new
GPS-I BLOCK I LANT_GPS_I GPS Block I
GPS-II BLOCK II LANT_GPS_II GPS Block II
GPS-IIA BLOCK IIA LANT_GPS_IIA GPS Block IIA
GPS-IIR-A BLOCK IIR-A LANT_GPS_IIR-A GPS Block IIR (original antenna)
GPS-IIR-B BLOCK IIR-B LANT_GPS_IIR-B GPS Block IIR (new antenna)
GPS-IIR-M BLOCK IIR-M LANT_GPS_IIR-M GPS Block IIR-M
GPS-IIF BLOCK IIF LANT_GPS_IIF GPS Block IIR-M
GLO GLONASS LANT_GLO GLONASS
GLO-M GLONASS-M LANT_GLO_M GLONASS-M+
GLO-M+ GLONASS-M LANT_GLO_M+ GLONASS-M
GLO-K1A GLONASS-K1 LANT_GLO_K1A GLONASS-K1
L3ANT_GLO_K1A
GLO-K1B GLONASS-K1 LANT_GLO_K1B GLONASS-K1
GAL-0A GALILEO-0A LANT_GIOVEA GIOVE-A
GAL-0B GALILEO-0B LANT_GIOVEB GIOVE-B
GAL-1 GALILEO-1 LANT_GAL_1 Galileo IOV
GAL-2 GALILEO-2 LANT_GAL_2 Galileo FOC
BDS-2M BEIDOU-2M LANT_BDS_2M BeiDou-2 MEO
BDS-2I BEIDOU-2I LANT_BDS_2I BeiDou-2 IGSO
BDS-2G BEIDOU-2G LANT_BDS_2G BeiDou-2 GEO
BDS-3SM-A BEIDOU-3SM LANT_BDS_3SM ?? BeiDou-3 experimental MEO, CAS
BDS-3SM-B BEIDOU-3SM LANT_BDS_3SM ?? BeiDou-3 experimental MEO, CAST
BDS-3SI-A BEIDOU-3SI LANT_BDS_3SI ?? BeiDou-3 experimental IGSO, CAS
BDS-3SI-B BEIDOU-3SI LANT_BDS_3SI ?? BeiDou-3 experimental IGSO, CAST
BDS-3M BEIDOU-3M LANT_BDS_3M BeiDou-3 MEO
QZS-1 QZSS LANT_QZS_1 QZSS Block I
L1SANT_QZS_1
QZS-2I QZSS-2I LANT_QZS_2I QZSS Block II IGSO
L1SANT_QZS_2I
L5SANT_QZS_2I
QZS-2G QZSS-2G LANT_QZS_2G QZSS Block II GEO
L1SANT_QZS_2G
L5SANT_QZS_2G
IRS-1I IRNSS-1I LANT_IRNSS_1I NAVIC IGSO
IRS-1G IRNSS-1G LANT_IRNSS_1G NAVIC GEO

SLR retroreflector device names
LRA name Description
LRA_GPS_IIA GPS IIA satellites
LRA_GLO_396_AL GLONASS sats, 396 prisms (irreg. planar, Al coating)
LRA_GLO_132_AL GLONASS sats, 132 prisms (irreg. circle, Al coating)
LRA_GLO_M_AL GLONASS-M sats, 112 prisms and Al coating
LRA_GLO_M GLONASS-M sats, 112 prisms (uncoated)
LRA_GLO_K1 GLONASS-K1 sats, 123 prisms (ring array, uncoated?)
LRA_GIOVEA GIOVE-A LRA, 76 prisms
LRA_GIOVEB GIOVE-B LRA, 67 prisms
LRA_GAL_1 Galileo IOV satellites, 84 prisms
LRA_GAL_2 Galileo FOC satellites, 60 prisms
LRA_BDS_2M BeiDou-2 MEO satellites, 42 prisms
LRA_BDS_2GI BeiDou-2 GEO and IGSO satellites, 90 prisms
LRA_BDS_3SM BeiDou-3S MEO satellites (same as BDS_2M?)
LRA_BDS_3SI BeiDou-3S MEO satellites (same as BDS_2GI?)
LRA_BDS_3M BeiDou-3 MEO satellites (same as BDS_3M?)
LRA_QZSS_1 QZS-1 (QZSS Block I) satellite, 56 prisms (uncoated)
LRA_QZSS_2 QZS-2 (QZSS Block II GEO & IGSO), 56 prisms (coated)
LRA_IRNSS IRNSS satellites, 40 prisms


Last Updated: 2018/03/14 10:04:01
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