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Rinex cut-off angle
Posted on 25 Feb, 2014 by DanielMoreira
Hello

I´ m just started to use GPSTK!

I would like to know if it's possible to I generate from a RINEX and ephemerides file one new RINEX file with satellite cut-off angles of X degrees.

I tried to use two commands without success:

PRSolve --obs temp3320.09o --BCEpast temp3320.09n --forceElev --elev 30 --out test.13o

Exception: text 0:CommonTime objects not in same time system, cannot be compared: UNK = UTC location 0:/home/bparsons/git/gpstk/dev/lib/TimeHandling/CommonTime.cpp:362 location 1:/home/bparsons/git/gpstk/dev/apps/positioning/PRSolve.cpp:1185

and

ResCor -IFtemp3321.09o --nav temp3320.09n --RAIM --MinElev 15 -OFteste

It's ok , but no cut-off was been applied,

Can anyone help me?

Thanks in advance

Add your comments to the Discussion
 

I faced a similar time problem in RinEdit:
<http://www.gpstk.org/bin/view/Forum/DiscussionForumArticle2013x10x17x13x56>
<http://sourceforge.net/p/gpstk/mailman/message/31537468/>
Not sure if it's exactly the same as what you're seeing.
FelipeNievinski 26 Jun 2014 - 19:56

I tried also to use ResCor but I have "text 0:Divide by Zero Error" when I tried to apply --MinElev command . Can anyone help me?

ResCor -IFRnovaRinex.obs --nav RnovaRinex?.nav --Callow --RAIM --MinElev 15 -OFteste3

ResCor, part of the GPS ToolKit?, Ver. 4.1 9/21/09 (ed. 3.5 6/21/2007), Run 2014/02/27 18:50:16
Opened log file (for all output, including debug) ResCor?.log
text 0:Divide by Zero Error
location 0:src/Position.cpp:1311
location 1:src/EphemerisRange.cpp:100
location 2:apps/Rinextools/ResCor.cpp:1710
location 3:apps/Rinextools/ResCor.cpp:1519
location 4:apps/Rinextools/RinexEditor.cpp:1361
DanielMoreira 18 Mar 2014 - 12:59

When I built the example7 in version 2.2 or 2.3 using the source code,the same error came out ! And I found that ,epochs in the RinexNavData objects do not contain the proper information of TimeSystem record , which is needed when computing the positions of satellites, so I replace all the RinexNavData objects with Rinex3NavData objects, and no errors any more.
I don't know whether it helps for you,just personal view.
XingzheWujiang 12 Mar 2014 - 22:36

I found that using version 1.7 precompiled binaries with the same RINEX files does not cause any errors, so I assume this is a bug...or maybe the newest version requires that the user specify the time system as a command line argument? DomFuller 05 Mar 2014 - 13:38

Also, where are you getting your RINEX files? DomFuller 28 Feb 2014 - 17:54

I also came across this error (regardless of if I specified a pitch angle) and I think it might have something to do the GLONASS vs GPS time. See Rinex 2.10 documentation, section "8.1.1 Time System Identifier" here ftp://igscb.jpl.nasa.gov/pub/data/format/rinex210.txt

Let me know if you find a solution!
DomFuller 28 Feb 2014 - 17:53

In some files the ResCor give this message :

ResCor -IFRnovaRinex.obs --nav RnovaRinex.nav --Callow --RAIM --MinElev 15 -OFteste3

ResCor, part of the GPS ToolKit, Ver. 4.1 9/21/09 (ed. 3.5 6/21/2007), Run 2014/02/27 18:50:16
Opened log file (for all output, including debug) ResCor.log
text 0:Divide by Zero Error
location 0:src/Position.cpp:1311
location 1:src/EphemerisRange.cpp:100
location 2:apps/Rinextools/ResCor.cpp:1710
location 3:apps/Rinextools/ResCor.cpp:1519
location 4:apps/Rinextools/RinexEditor.cpp:1361
DanielMoreira 27 Feb 2014 - 12:00



Topic revision: r7 - 27 Jun 2014, FelipeNievinski
 

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