From: Manuel Hernandez-Pajares (manuel@ma4.upc.edu)
To:   DLR, Qinetic
Date: October 28th, 2013
Subject: Information corresponding to tijason2 files generated by UPC and make available to DLR and Qinetiq in the context of MONITOR project for double checking purposes, in the MONITOR VTECs validation against JASON2 VTEC over the oceans.

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Record example of tijason2 file:

13 1 0.004603 JA2_ 0 90.000 6371.00 63.505775 37.805431 7707.00 63.505775 37.805431 0.484338    0.1405

Meaning:

13        ==> yy, last two digits of observation year
1         ==> doy, day of year 
0.004603  ==> tgpshours, GPS time / hours of day
JA2_      ==> rec, altimeter identifier in this case 
0         ==> prn, 0 for altimeters
90.000    ==> ele, ray nominal elevation / deg
6371.00   ==> re, average geocentric distance of sea surface / km 
63.505775 ==> ra, right ascension of sea obs. footprint / deg
37.805431 ==> lat, latitude of sea obs. footprint / deg
7707.00   ==> rJA2, geocentric distance of JASON2 altimeter / km
63.505775 ==> ra, right ascension of JASON2 altimeter / deg
37.805431 ==> lat, latitude of JASON2 altimeter / deg
0.484338  ==> vtec, Vertical Electron Content (VTEC)[*] below JASON2 / meters of L1-L2[**] 
0.1405    ==> sigma, Std. Dev.[*] of the VTEC JASON2 / meters of L1-L2 

Writing command and detailed format (in awk programming language):

printf "%2d %3d %9.6f %s %2d %6.3f %7.2f %11.6f %10.6f %7.2f %11.6f %10.6f %9.5f %9.4f\n",yy,doy,tgpshours,rec,prn,ele,re,ra,lat,rJA2,ra,lat,vtec,sigma


[*] Smoothed within a sliding window of 16 samples
[**] 1 TECU = 0.105 meters of L1-L2