D R A F T SINEX_BIAS - Solution (Software/technique) INdependent EXchange Format for GNSS Biases Version 0.01 (June 29, 2011) 1. INTRODUCTION For the new IGS product - the series of total zenith path delay transformed to precipitable water vapor - a format must be defined. This format should be used on the one hand by the IGS Analysis Centers to submit their results for the combination and on the other hand for the distribution of the combined products. The files should have a simple but flexible structure , so that the Anlysis Centers can straightforward reformat their internal bias estimates as well as users can easily read and handle the products. The proposed format is based on the SINEX Format. A number of blocks may be taken directly from SINEX 2.02, namely: FILE/REFERENCE SITE/ECCENTRICITY SITE/ID SITE/ANTENNA SITE/RECEIVER SITE/GPS_PHASE_CENTER Some other blocks are defined within this document. 2. PHILOSOPHY Submission ---------- The Analysis Centers should submit daily files containing the estimated GNSS biases from all global sites and satellites. Only information directly connected to the bias estimates should be give, the corresponding blocks are: FILE/REFERENCE BIAS/DESCRIPTION (Mandatory) BIAS/SOLUTION (Mandatory) All other blocks of interest for the combination product, which describe the site relevant parameters, may be taken from the weekly SINEX-product for the station coordinates and earth rotation parameters. By this way we can avoid redundancy of information which are constant within a week. The files are named: cccwwwwd.bias e.g. p2_16330.bias cccwwww7.snx p2_16337.snx A P P E N D I X I S I N E X _ B I A S V E R S I O N 0 . 0 1 D E T A I L F O R M A T D E S C R I P T I O N 1. Header and Footer Lines (Mandatory) Description The Header line must be the first line in a SINEX_BIAS file. The Footer line must be the last line in a SINEX_BIAS file. Contents: ___________________________________________________________________ |_____________H_E_A_D_E_R___L_I_N_E_________________________________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | File Identifier| %=BIA | A5 | |________________|___________________________________|______________| | | | | | Format Version | Four digits indicating the version| 1X,F4.2 | | | of SINEX_BIAS format used. | | |________________|___________________________________|______________| | | | | | File Agency | Identify the agency creating the | 1X,A3 | | Code | file. | | |________________|___________________________________|______________| | | | | | Time | Creation time of this SINEX file. | 1X,I2.2, ':',| | | | I3.3,':',I5.5| |________________|___________________________________|______________| | | | | | Agency Code | Identify the agency providing the | 1X,A3 | | | data in the SINEX file | | |________________|___________________________________|______________| | | | | | Time | Start time of solution in the | 1X,I2.2, ':',| | | this SINEX_BIAS file | I3.3,':',I5.5| |________________|___________________________________|______________| | | | | | Time | End time of the solution in the | 1X,I2.2, ':',| | | this SINEX_BIAS file | I3.3,':',I5.5| |________________|___________________________________|______________| | | | | | Observation | Technique(s) used to generate the | 1X,A1 | | Code | SINEX solution | | |________________|___________________________________|______________| | | | | | Number of Est- | Number of parameters estimated in | 1X,I5.5 | | timates | this SINEX file. | | | | Mandatory field. | | |________________|___________________________________|______________| | | | | | [Constraint | Single character indicating the | 1X,A1 | | Code] | constraint in the SINEX solution. | | | | Mandatory field. | | |________________|___________________________________|______________| | | | | | Solution | Marker name if this is a combined | 1X,A4 | | Contents | solution file and contains only | | | | one site or 'MIX' if it is a | | | | submission file containing more | | | | than one site | | |________________|___________________________________|______________| | | | 64 | |______________| ___________________________________________________________________ |_____________F_O_O_T_E_R___L_I_N_E_________________________________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | File Identifier| %=ENDBIA | A8 | |________________|___________________________________|______________| | | | 8 | |______________| 2. BIAS/DESCRIPTION Block (Mandatory) Description This block gives important parameters from the analysis and defines the fields in the block 'BIAS/SOLUTION'. Contents: ___________________________________________________________________ |__________________BIAS/DESCRIPTION__D_A_T_A__L_I_N_E_______________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | Information | Describes the type of information | 1X,A29 | | Type | present in the next field. May | | | | take one the following values: | | | | | | | | 'SAMPLING INTERVAL': (1X,I22)| | | | Data sampling interval [sec] | | | | | | | |***********************************| | | | | | | | TBD 1 (1X,A22)| | * Info on reference values | | TBD 2 | | * Info on linear combination used | | TBD 3 | | | | TBD 4 | | |________________|___________________________________|______________| | | | | | Information | Relevant information for the type |format is | | | indicated by the previous field. |type-dependent| |________________|___________________________________|______________| | | | 53 | |______________| 4. BIAS/SOLUTION Block (Mandatory) Description This block contains the solution for all epochs. Contents: ___________________________________________________________________ |___________________BIAS/SOLUTION__D_A_T_A__L_I_N_E_________________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | BIAS | Bias type identifier | 1X,A4 | | | Available types are: | | | | IFB: Inter frequency bias | | | | units: ns | | | | DCB: Differential code bias | | | | units: ns | | |________________|___________________________________|______________| | | | | | SVN | Satellite code "CNNN" | 1X,A4 | | | C - satellite system flag | | | | NNN - SVN or GLONASS number | | |________________|___________________________________|______________| | | | | | PRN | Satellite PRN code "CNN" | 1X,A3 | | | C - satellite system flag | | | | NN - PRN for GPS and GALILEO | | | | Slot number for GLONASS | | |________________|___________________________________|______________| | | | | | SITE Code | Station 4-character ID | A4 | | | Call sign for a site.(It should be| | | | consistent with ITRF). | | |________________|___________________________________|______________| | | | | | DOMES | Unique alpha-nummeric monument | 1X,A9 | | Unique monument| identification. For ITRF purposes,| | | identification | it is a nine character DOMES/DOMEX| | | | number (five/six digits, followed | | | | by the single letter 'M' or 'S', | | | | followed by four/three digits) | | |________________|___________________________________|______________| | | | | | OBS1/OBS2 | Observations used for estimating | 2(1X,A4) | | Observation | the biases. | | | Codes | Follows the RINEX definition: | | | | P1C, P1P, L1C, E5Q, L7Q, etc. etc.| | | | No identification for linear | | ** Something for DESCRIPTION block | | combinations | | |________________|___________________________________|______________| | | | | | [Time] | Start time for the bias estimate | 1X,I2.2, | | | | 1H:,I3.3, | | | | 1H:,I5.5 | |________________|___________________________________|______________| | | | | | [Time] | End time for the bias estimate | 1X,I2.2, | | | | 1H:,I3.3, | | | | 1H:,I5.5 | |________________|___________________________________|______________| | | | | | Parameter | Estimated value of the parameter. | 1X,E21.15 | | Estimate | | | |________________|___________________________________|______________| | | | | | Parameter | Estimated standard deviation for | 1X,E11.6 | | Standard | the parameter. | | | Deviation | | | |________________|___________________________________|______________| | | | 104 | |______________| Bias Types: ISB - Interfrequency or Intersystem biases [ns] Estimated from "normal" orbit and clock process DCB - Differential code biases [ns] Estimated from "ionosphere" estimation process Note on SVN, PRN, and SITE usage: If a bias depends only on a satellite SVN/PRN should be filled, site may be left empty If a bias depends only on a station SITE should be filled, SVN/PRN may be left empty If a bias depends only on a station SITE and a full "constellation", SVN/PRN should only have the system code ("G", "R", or "E" for GPS, GLO, and GAL) If a bias depends on both satelite and station all three fields should be used SVN/PRN/SITE (If SITE is filled DOMES should be filled as well of course) A P P E N D I X II ******************************************************************************* ******************************************************************************* ** ** ** Example for Submissions of Bias Estimates ** ** ** ******************************************************************************* ******************************************************************************* ----|---1|0---|---2|0---|---3|0---|---4|0---|---5|0---|---6|0---|---7|0---|---8| %=BIA 0.01 PF2 11:180:59736 PF2 11:113:86385 11:114:86385 P 04774 2 MIX *------------------------------------------------------------------------------- * Solution INdependent EXchange Format (SINEX) *------------------------------------------------------------------------------- +FILE/REFERENCE REFERENCE FRAME IGS08 DESCRIPTION European Space Operation Center (ESOC) INPUT ESOC solutions in normal equation format OUTPUT ESOC solutions in Bias-SINEX format CONTACT Tim.Springer@esa.int.nospam HARDWARE Linux dgnl2 2.6.27.19-5-default #1 SMP 2009-02-28 04:40:21 SOFTWARE Napeos 3.6 TAS 07/06/2011 -FILE/REFERENCE *------------------------------------------------------------------------------- +BIAS/DESCRIPTION SAMPLING INTERVAL (sec): 300 TBD 1: TBD 1 TBD 2: TBD 2 TBD 3: TBD 3 TBD 4: TBD 4 -BIAS/DESCRIPTION *------------------------------------------------------------------------------- +BIAS/SOLUTION *BIAS SVN_ PRN SITE DOMES____ OBS1 OBS2 BIAS_START__ BIAS_END____ UNIT __ESTIMATED_VALUE____ _STD_DEV___ ISB E016 E16 GIEN 12724M003 L1C L7Q 11:113:86385 11:115:00285 ns -.157174143960592E+03 .259286E+02 ISB E016 E16 GKIR 10403M003 L1C L7Q 11:113:86385 11:115:00285 ns -.153942459345551E+03 .259286E+02 ISB E016 E16 GKOU 97301M211 L1C L7Q 11:113:86385 11:115:00285 ns -.163243805130824E+03 .259285E+02 ISB E016 E16 GLPG 41510M002 L1C L7Q 11:113:86385 11:115:00285 ns -.151698143836368E+03 .259290E+02 ISB E016 E16 GMAL 33201M002 L1C L7Q 11:113:86385 11:115:00285 ns -.156472089904428E+03 .259285E+02 ISB E016 E16 GMIZ 21702M003 L1C L7Q 11:113:86385 11:115:00285 ns -.167156432084244E+03 .259321E+02 ISB E016 E16 GNNO 50181M002 L1C L7Q 11:113:86385 11:115:00285 ns -.156922861008147E+03 .259665E+02 ISB E016 E16 GNOR 13535M001 L1C L7Q 11:113:86385 11:115:00285 ns -.153679440866705E+03 .259285E+02 ISB E016 E16 GOUS 50212M004 L1C L7Q 11:113:86385 11:115:00285 ns -.101593337222667E+03 .259439E+02 ISB E016 E16 GTHT 92201M014 L1C L7Q 11:113:86385 11:115:00285 ns -.159918985571303E+03 .259356E+02 ISB E016 E16 GUSN 40451M126 L1C L7Q 11:113:86385 11:115:00285 ns -.149146613879327E+03 .259279E+02 ISB E016 E16 GVES 66037M002 L1C L7Q 11:113:86385 11:115:00285 ns -.156221372596643E+03 .259288E+02 -BIAS/SOLUTION *------------------------------------------------------------------------------- %=ENDBIA ----|---1|0---|---2|0---|---3|0---|---4|0---|---5|0---|---6|0---|---7|0---|---8|