D R A F T SINEX_TRO - Solution (Software/technique) INdependent EXchange Format for combination of TROpospheric estimates Version 0.01 (March 01, 1997) 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 tropospheric estimates as well as the customers can easily read and handle the products. The proposed format is based on the SINEX Format. A number of blocks are taken directly from SINEX 1.00, 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 total zenith path delay parameters from all global sites. Only those information should be given which is directly connected with the troposphere estimates, the corresponding blocks are FILE/REFERENCE TROP/DESCRIPTION (Mandatory) TROP/STA_COORDINATES (Mandatory) TROP/SOLUTION (Mandatory) All other blocks of interest for the combination product, which describe the site relevant parameters, will be taken from the weekly SINEX-product for the station coordinates and earth rotation parameters. By this way we can avoid redundancy for information which are constant within a week. The meteorological surface data are taken directly from the Global Data Centers and should be in RINEX-2-Format. The files are named: cccwwwwd.tro e.g. gfz08901.tro cccwwww7.snx gfz08907.snx ssssdddv.yym algo3660.96m Combination Product ------------------- For the customer, who is interested in e.g. time series of water vapor at a site, it is convenient to have a product with separate files for each site. Therefore the product will be a weekly file for each site. Weekly files were preferred (instead of daily) to save disc storage by storing those information only once which normally is not varying from day to day. The file contains the following blocks: FILE/REFERENCE TROP/DESCRIPTION SITE/ID TROP/STA_COORDINATES SITE/RECEIVER CENTERS/INFO_SOLUTION SITE/ECCENTRICITY CENTERS/INFO_MODEL SITE/ANTENNA TROP/SOLUTION SITE/GPS_PHASE_CENTER If there are no meteorological surface data so that the zenith path delay values can not be converted into precipitable water vapor then the file should have a different name indicating this fact. The files are named: sssswwww.eee e.g. algo0890.zpd for zenith path delay product algo0890.tro for water vapor product A P P E N D I X I S I N E X _ T R O 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_TRO file. The Footer line must be the last line in a SINEX_TRO file. Contents: ___________________________________________________________________ |_____________H_E_A_D_E_R___L_I_N_E_________________________________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | File Identifier| %=TRO | A5 | |________________|___________________________________|______________| | | | | | Format Version | Four digits indicating the version| 1X,F4.2 | | | of SINEX_TROP 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_TROP file | I3.3,':',I5.5| |________________|___________________________________|______________| | | | | | Time | End time of the solution in the | 1X,I2.2, ':',| | | this SINEX_TROP file | I3.3,':',I5.5| |________________|___________________________________|______________| | | | | | Observation | Technique(s) used to generate the | 1X,A1 | | Code | SINEX solution | | |________________|___________________________________|______________| | | | | | 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| %=ENDTRO | A8 | |________________|___________________________________|______________| | | | 8 | |______________| 2. TROP/STA_COORDINATES Block (Mandatory) Description This block provides the coordinates of the sites. For the combination result it also gives some statistical information. Contents: ___________________________________________________________________ |_______________TROP/STA_COORDINATES__D_A_T_A__L_I_N_E______________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | Site Code | Call sign for a site. | 1X,A4 | |________________|___________________________________|______________| | | | | | Point Code | Physical monument used at a site | 1X,A2 | |________________|___________________________________|______________| | | | | | Solution ID | Solution number to which the input| 1X,A4 | | | in this data line is referred to. | | |________________|___________________________________|______________| | | | | | Observation | Observation technique used. | 1X,A1 | | Code | | | |________________|___________________________________|______________| | | | | | Coordinates | x,y,z-coordinate of a site | 3(1X,F12.3) | | | of SINEX_TROP format used. | | |________________|___________________________________|______________| | | | | | System | Terrestrial Reference System Code | 1X,A6 | |________________|___________________________________|______________| | | | | | Remark | A remark used to identify the | 1X,A5 | | | origin of the coordinates | | | | (AC acronym or 'Mean') | | |________________|___________________________________|______________| | | | | | Standard | Standard deviation for x,y,z | 3(1X,I2) | | Deviation | in [mm] (Used only for Mean) | | |________________|___________________________________|______________| | | | | | Counter | Number of ACs used for Mean | 1X,I2 | | | (Used only for Mean) | | |________________|___________________________________|______________| | | | 79 | |______________| 3. TROP/DESCRIPTION Block (Mandatory) Description This block gives important parameters from the analysis and defines the fields in the block 'TROP/SOLUTION'. Contents: ___________________________________________________________________ |__________________TROP/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: | | | | | | | | 'SOLUTION_FIELDS_1': (7(1X,A6))| | | | Names of fields in solution | | | | (see below) | | | | 'SOLUTION_FIELDS_2': (7(1X,A6))| | | | Used if more than 7 fields | | | | must be coded | | | | 'SAMPLING TROP': (1X,I22)| | | | Solution sample rate [sec] | | | |***********************************| | | | Only for submissions: | | | | 'SAMPLING INTERVAL': (1X,I22)| | | | Data sampling interval [sec] | | | | 'TROP MAPPING FUNCTION': (1X,A22)| | | | Name of mapping function used. | | | | 'ELEVATION CUTOFF ANGLE': (1X,F22)| | | | Elevation cutoff angle [deg] | | | | | | | | | | | |***********************************| | | | Only for combined solution: | | | | 'BIAS FROM INTERVAL':(12X,I5,X,I5)| | | | Begin and end of interval for | | | | bias computation [yyddd] | | | | 'DELETE FACTOR': (1X,F22)| | | | Limit (factor*sigma) for editing| | | | of trop estimates | | | | 'CONVERSION FACTORS': (1X,A22)| | | | Factors used during conversion | | | | from ZPD into PWV | | | | | | | |***********************************| | | | | | | | The above fields may be in any | | | | order. | | |________________|___________________________________|______________| | | | | | Information | Relevant information for the type |format is | | | indicated by the previous field. |type-dependent| |________________|___________________________________|______________| | | | 53 | |______________| Fields TROTOT - Total zenith path delay [mm] TROWET - Wet zenith path delay [mm] PWV - Precipitable water vapor [mm] STDDEV - stddev of the values in the column before PRESS - Pressure (mbar) TEMDRY - Dry temperature (deg Celsius) HUMREL - Relative Humidity (percent) #ACTAK - Number of ACs taken into account for given epoch #ACDEL - Number of ACs deleted for given epoch DSTAX - Difference to given Sta coordinate in [mm] DSTAY - Difference to given Sta coordinate in [mm] DSTAZ - Difference to given Sta coordinate in [mm] This differences are only used for the combined product where the history of station coordinates from day to day is given by this differences 4. TROP/SOLUTION Block (Mandatory) Description This block contains the solution for all epochs. Contents: ___________________________________________________________________ |___________________TROP/SOLUTION__D_A_T_A__L_I_N_E_________________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | Marker | Name of the marker | 1X,A4 | |________________|___________________________________|______________| | | | | | Time | Time epoch of the solution | 1X,I2.2, ':',| | | (Middle of data interval) (**) | I3.3,':',I5.5| |________________|___________________________________|______________| | | | | | Values | Space separated fields of variable| no format | | | length . Number and order of | | | | fields are given in the block | | | | TROP/DESCRIPTION | | | | Readable by: | | | | read(line(20:),*)(val(i),i=1,n) | | |________________|___________________________________|______________| | | | variable<80 | |______________| (**) The data intervals should be 30, 60 or 120 minutes starting at 00:00 UT (smaller intervals, which are integer parts of 30 minutes are possible) 5. CENTERS/INFO_MODEL Block Description This block contains the information about the parameters used by the contributing Analysis Centers. Contents: ___________________________________________________________________ |_________________CENTERS/INFO_MODEL__D_A_T_A__L_I_N_E______________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | Analysis Center| Name of Analysis Center | 1X,A3 | |________________|___________________________________|______________| | | | | | Observation | Observation technique used. | 1X,A1 | | Code | | | |________________|___________________________________|______________| | | | | | Cutoff angle | Elevation cutoff angle used | 1X,I3 | |________________|___________________________________|______________| | | | | | Data rate | Sampling rate for used data | 1X,I4 | |________________|___________________________________|______________| | | | | | Trop rate | Sampling rate for trop estimates | 1X,I4 | |________________|___________________________________|______________| | | | | | Mapping funct. | Mapping functions used | 1X,A29 | |________________|___________________________________|______________| | | | 51 | |______________| 6. CENTERS/INFO_SOLUTION Description This block contains for the site in the product file the information about the data and biases for the contributing Analysis Centers. Contents: ___________________________________________________________________ |___________________TROP/SOLUTION__D_A_T_A__L_I_N_E_________________| | | | | |__Field_________|______Description__________________|___Format_____| | | | | | Analysis Center| Name of Analysis Center | 1X,A3 | |________________|___________________________________|______________| | | | | | # of days | Number of days used by the AC | 1X,i2 | |________________|___________________________________|______________| | | | | | Day_code | Flag for each day (0 or 1) | 1X,7I1 | |________________|___________________________________|______________| | | | | | # of Biases | Number of biases for the interval | 1X,I2 | | | ( 1=weekly; 7=daily ) | | |________________|___________________________________|______________| | | | | | Biases | Biases for each day in [mm] | 7(1X,F6.1) | |________________|___________________________________|______________| | | | 67 | |______________| A P P E N D I X II ******************************************************************************* ******************************************************************************* ** ** ** Example for Submissions of Trop Estimates ** ** ** ******************************************************************************* ******************************************************************************* ----|---1|0---|---2|0---|---3|0---|---4|0---|---5|0---|---6|0---|---7|0---|---8| %=TRO 0.01 GFZ 96:999:88888 GFZ 97:034:00000 97:034:86399 P MIX +FILE/REFERENCE DESCRIPTION GeoForschungsZentrum Potsdam, Dept.1 OUTPUT Daily trop estimates CONTACT Gerd Gendt; gend@gfz-potsdam.de -FILE/REFERENCE * +TROP/DESCRIPTION *_________KEYWORD_____________ __VALUE(S)______________________ ELEVATION CUTOFF ANGLE 20 SAMPLING INTERVAL 360 SAMPLING TROP 7200 TROP MAPPING FUNCTION SAASTAMOINEN SOLUTION_FIELDS_1 TROTOT STDDEV -TROP/DESCRIPTION +TROP/STA_COORDINATES *SITE PT SOLN T __STA_X_____ __STA_Y_____ __STA_Z_____ SYSTEM REMRK KOSG A 1 P 3899225.255 396731.823 5015078.339 ITRF94 GFZ MADR A 1 P 4849202.480 -360329.112 4114913.095 ITRF94 GFZ MATE A 1 P 4641949.719 1393045.289 4133287.342 ITRF94 GFZ ... -TROP/STA_COORDINATES +TROP/SOLUTION *SITE ____EPOCH___ TROTOT STDEV KOSG 97:033:18000 2371.9 0.5 KOSG 97:033:54000 2392.5 0.5 KOSG 97:033:75600 2400.4 1.0 ... -TROP/SOLUTION %=ENDTRO ******************************************************************************* ******************************************************************************* ** ** ** Example for Combination Product ** ** ** ******************************************************************************* ******************************************************************************* ----|---1|0---|---2|0---|---3|0---|---4|0---|---5|0---|---6|0---|---7|0---|---8| %=TRO 0.01 GFZ 97:056:38370 COM 97:033:00000 97:039:86399 P ALGO +FILE/REFERENCE DESCRIPTION GeoForschungsZentrum Potsdam, Dept.1 OUTPUT COMBINATION OF TROP ESTIMATES FROM ALL ANALYSIS CENTERS CONTACT Gerd Gendt; gend@gfz-potsdam.de -FILE/REFERENCE * +TROP/STA_COORDINATES *SITE PT SOLN T __STA_X_____ __STA_Y_____ __STA_Z_____ SYSTEM REMRK SDEV„mm” NC ALGO A 1 P 918129.512 -4346071.247 4561977.825 ITRF94 Mean 5 4 1 4 -TROP/STA_COORDINATES *------------------------------------------------------------------------------- +SITE/ID ALGO A 40104M002 P Algonquin Park, Canada 281 55 43.1 45 57 20.9 200.0 -SITE/ID *------------------------------------------------------------------------------- +SITE/RECEIVER *SITE PT SOLN T _DATA_START_ __DATA_END__ ____DESCRIPTION_____ _S/N_ _FIRMWARE__ ALGO A 1 P 95:279:77400 00:000:00000 ROGUE SNR-8000 226 3.2.32. -SITE/RECEIVER *------------------------------------------------------------------------------- +SITE/ECCENTRICITY * ___ARP___to__BENCHMARK_(m) *SITE PT SOLN T _DATA_START_ __DATA_END__ AXE ___UP___ _NORTH__ __EAST__ ALGO A 1 P 95:280:00000 00:000:00000 UNE 0.1000 0.0000 0.0000 -SITE/ECCENTRICITY *------------------------------------------------------------------------------- +SITE/ANTENNA *SITE PT SOLN T _DATA_START_ __DATA_END__ ____DESCRIPTION_____ _S/N_ ALGO A 1 P 94:139:00000 00:000:00000 DORNE MARGOLIN T 173 -SITE/ANTENNA *------------------------------------------------------------------------------- +SITE/GPS_PHASE_CENTER * ____L1-ARP(m)_______ ____L2-ARP(m)_______ *____DESCRIPTION_____ _S/N_ __up__ north_ _east_ __up__ north_ _east_ AZIMU_ELEV DORNE MARGOLIN T ----- 0.1100 0.0000 0.0000 0.1280 0.0000 0.0000 IGS_01 -SITE/GPS_PHASE_CENTER *------------------------------------------------------------------------------- +TROP/DESCRIPTION *_________KEYWORD_____________ __VALUE(S)________________________ SAMPLING TROP 7200 BIAS FROM INTERVAL 97033 97039 DELETE FACTOR 2.5 CONVERSION FACTORS 2.2765 22.1 3.739e5 SOLUTION_FIELDS_1 TROTOT STDDEV PWV STDDEV PRESS TEMDRY HUMREL SOLUTION_FIELDS_2 #ACTAK #ACDEL DSTAX DSTAY DSTAZ -TROP/DESCRIPTION *------------------------------------------------------------------------------- +CENTERS/INFO_SOLUTION *_AC #D DAY_COD #B _BIAS_ _BIAS_ _BIAS_ _BIAS_ _BIAS_ _BIAS_ _BIAS_ NRC 7 1111111 1 6.4 6.4 6.4 6.4 6.4 6.4 6.4 ESA 7 1111111 1 -6.3 -6.3 -6.3 -6.3 -6.3 -6.3 -6.3 GFZ 6 0111111 1 -4.7 -4.7 -4.7 -4.7 -4.7 -4.7 -4.7 JPL 7 1111111 1 -1.5 -1.5 -1.5 -1.5 -1.5 -1.5 -1.5 -CENTERS/INFO_SOLUTION *------------------------------------------------------------------------------- +CENTERS/INFO_MODEL *AC_ T CUT DATA TROP __TROP_MAPPING_FUNCTION______ NRC P 15 450 3600 LANYI ESA P 20 360 7200 not given GFZ P 20 360 3600 SAATAMOINEN JPL P 15 300 300 LANYI -CENTERS/INFO_MODEL *------------------------------------------------------------------------------- +TROP/SOLUTION *SITE ___EPOCH____ TROTOT _SIG PWV_ SIG PRESS_ _TEMP _HUMI #T #D DSTX DSTY DSTZ *day 33 ALGO 97:033:03600 2358.9 1.7 3.7 0.3 1026.1 -1.8 87.5 1 0 0 0 0 ALGO 97:033:10800 2355.1 1.4 3.1 0.2 1026.1 -2.0 88.2 1 0 0 0 0 ... *day 34 ALGO 97:034:03600 2351.7 1.6 2.8 0.2 1025.6 -2.3 89.2 1 0 1 2 1 ALGO 97:034:10800 2355.1 1.4 3.1 0.2 1026.1 -2.0 88.2 1 0 1 2 1 ... -TROP/SOLUTION %=ENDTRO ----|---1|0---|---2|0---|---3|0---|---4|0---|---5|0---|---6|0---|---7|0---|---8|
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