[IGSREPORT-27515] Wk 2124 GRG Analysis report

[igs-ac at cls.fr]

Author: CNES CLS GRGS Analysis Center

CNES CLS GPS WEEK 2124 (DAYS: 264 - 270 , JUL50: 25830 - 25836 ) 
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PRODUCT SUMMARY 

Submitted by: S. Loyer    (1), F. Perosanz (2), H. Capdeville  (1), 
              F. Mercier  (2), A Mezerette (1), G. Katsigianni (1),
              A. Banos Garcia (3)

(1) CLS,   Toulouse, France
(2) CNES,  Toulouse, France
(3) ALTEN, Toulouse, France

Contacts: igs-ac at groupcls.com
Web:      igsac-cnes.cls.fr 

PROCESSING STRATEGY 
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 Softwares used : PRAIRIE/GINS/DYNAMO   Version : CR8BID

 grg.acn : GRG Analysis Center processing strategy and used models
           available at IGS GB:
           igscb.jpl.nasa.gov/igscb/center/analysis/grg.acn 

 Main Processing changes for grg final products :                              
              week 1436 : First delivery 
              week 1515 : 30 sec. GPS daily clocks
              week 1555 : Start of the fixed-integer products (GPS)
              week 1580 : Simplification of B&W models
              week 1602 : Correction in the integer initialization of pwu 
              week 1618 : Delivery of Glonass ephemeris (no changes for GPS)
              week 1632 : PCVs from igs08.atx / Reference frame igs08 
              week 1659 : Combined GLO/GPS + Kouba's attitude law + gradients
              week 1701 : GNSS clocks now computed in COF frame  
              week 1702 : Switch to daily SINEX products
              week 1709 : Switch to IGb08 (refer to IGSMAIL-6663) 
              week 1718 : S1S2 atm.loading and CMC corrections (IERS2010) 
              week 1759 : Updated Standards / New Dyn for bloc IIA GPS
              week 1831 : Seasonal variations for a priori tropospheric modellt 
                          gpt2 (corrected)  
              week 1840 : grg final products are identical to grm products 
                          delivered for MGEX (Multi Gnss EXperiment)
                          but contain only GPS and Glonass values. 
              week 1856 : adoption of  igs08_1854.atx containing conventional
                          MGEX values for GALILEO (see IGSMAIL-7126)
              week 1915 : Updated Galileo PCVs isee IGSMAIL-7356
              week 1934 : PCVs from igs14.atx / Reference frame igs14 
              week 1997 : New elev. dependent law; cut-off 8°; sampling 5'
                          Galileo Attitude Law from ESA (IOV/FOC) 
              week 2022 : Start of the fixed-integer products (GAL)  
              week 2052 : Satellite antena XYZ offsets parameters (Sinex)
              week 2093 : Use of UT1 zonal terms in final orbits computations (only linear before)
              week 2106 : according to IGSMAIL-7921 : Switch to IGb14 reference frame

FILES SENT TO IGS ARCHIVES (Multi Gnss EXperiment):
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grm21247.erp.Z      GNSS daily earth rotation parameters, IGS format
grm2124?.snx.Z      GNSS daily coordinates/erp solution   
grm2124?.sp3.Z      15' daily orbits, sp3c format , GNSS (GPS/GLO/GAL)
grm2124?.clk.Z      30 sec. GNSS daily clocks, RINEX     (GPS/GLO/GAL)    
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FILES SENT TO IGS ARCHIVES (IGS finals):
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grg21247.sum.Z      This text file 
grg21247.erp.Z      GNSS daily earth rotation parameters, IGS format
grg2124?.snx.Z      GNSS daily coordinates/erp solution   
grg2124?.sp3.Z      15' daily orbits, sp3c format , GNSS (GPS/GLO) 
grg2124?.clk.Z      30 sec. GNSS daily clocks, RINEX     (GPS/GLO)
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 Wide Lane Satellite biases (updated weekly):
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ftp://ftpsedr.cls.fr/pub/igsac/Wide_lane_GPS_satellite_biais.wsb
ftp://ftpsedr.cls.fr/pub/igsac/Wide_lane_GAL_satellite_biais.wsb
(format of wsb files ftp://ftpsedr.cls.fr/pub/igsac/wsb_clk_format.txt)
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 List of unfixed satellites (day by day) for Galileo and GPS:
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ftp://ftpsedr.cls.fr/pub/igsac/GRG_ELIMSAT_all.dat
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ERP RESULTS