Dear Timo
I'm bit lost. Does this look sensible? Do I need more than RXM-RAW to
calculate my position? Perhaps ephemeris in some format? I would
greatly appreciate a step-by-step tutorial for newbies :-)
I have two identical receivers so I was hoping that if I keep one at a
fixed location I could use it to aid the moving receiver (perhaps over
WLAN?). Is this possible and are there command line tools for it?
With rtklib 2.3.0:
(1) configure to output RXM-SFRB in order to get
ephemeris from u-blox.
(2) build convbin and rnx2rtkp.
(3) execute convbin and rnx2rtkp.
$ convbin hoge.ubx
$ ls
hoge.obs hoge.nav hoge.gnav hoge.sbs
$ rnx2rtkp -p 0 hoge.obs hoge.nav > hoge.pos
(4) rtkrcv can provide rtk or dgps with two u-blox.
You can also use GUI APs on Windows. Please refer
the manual for details.
I plan to release rtklib 2.4.0 end of July or beginning
of August. Try it too.
regards,
Tomoji TAKASU
WWW: http://gpspp.sakura.ne.jp
--------------------------------------------------
From: "Timo Juhani Lindfors" <[email protected]>
Sent: Tuesday, July 20, 2010 4:31 PM
To: <[email protected]>
Subject: [FOSS-GPS] software for convering UBX to RINEX?
Hi,
I finally figured out how to get RXM-RAW UBX messages that supposedly
contain raw pseudorange information. How should I go about checking if
the data is any good? I guess I should first figure how to convert it
to RINEX?
1) Google finds http://home.comcast.net/~dmilbert/softs/ant2rin.htm which
does not quite compile with gfortran in Debian:
wget http://home.comcast.net/~dmilbert/softs/ant2rin.for.txt
mv ant2rin.for.txt ant2rin.f
gfortran-4.4 ant2rin.f
ant2rin.f:27.72:
open(lin, file='ant2rin.ubx',form='binary',status='old')
1
Error: FORM specifier in OPEN statement at (1) has invalid value 'binary'
ant2rin.f:496.72:
call getarg(ipos,buff,status)
1
Error: Too many arguments in call to 'getarg' at (1)
2) http://ls.unavco.org/pipermail/teqc/2006/000342.html talks about
some teqc program which has an FAQ entry with "The UNAVCO Facility does
not make the teqc source code available, except in special
circumstances usually requiring a non-disclosure agreement."
3) http://www.gogps-project.org/ depends on non-free matlab with java
version "available soon".
4) gpstoolkit source code does not mention UBX at all.
5) rtklib has a convbin tool. Is this the tool I should be using?
lindi1:~/tmp$ cat /dev/gps > RXM-RAW.1279580805.ubx
lindi1:~/tmp$ ~/debian/debian-rtklib/rtklib_2.3.0/app/convbin/gcc/convbin
RXM-RAW.1279580805.ubx
input file: RXM-RAW.1279580805.ubx (u-blox)
rinex obs : RXM-RAW.1279580805.obs
rinex nav : RXM-RAW.1279580805.nav
rinex gnav : RXM-RAW.1279580805.gnav
sbas msg : RXM-RAW.1279580805.sbs
2010/07/19 23:07:09-07/20 04:33:07: O=19557 N=0 G=0 S=0 E=2
lindi1:~/tmp$ ls -l
total 15960
-rw-r--r-- 1 lindi kurp 324 Jul 20 10:26 RXM-RAW.1279580805.gnav
-rw-r--r-- 1 lindi kurp 648 Jul 20 10:26 RXM-RAW.1279580805.nav
-rw-r--r-- 1 lindi kurp 11985665 Jul 20 10:26 RXM-RAW.1279580805.obs
-rw-r--r-- 1 lindi kurp 0 Jul 20 10:26 RXM-RAW.1279580805.sbs
-rw-r--r-- 1 lindi kurp 4313904 Jul 20 10:22 RXM-RAW.1279580805.ubx
lindi1:~/tmp$ RinexDump RXM-RAW.1279580805.obs | head
# Rinexdump File: RXM-RAW.1279580805.obs Satellites: ALL Observations:
ALL
# Time (%4F %10.3g) Sat C1 L S L1 L S P2
L S L2 L S
1593 169628.998 G03 22012169.085 0 0 115674638.547 0 0 0.000 0
0 0.000 0 0
1593 169628.998 G06 22691984.402 0 0 119247189.216 0 0 0.000 0
0 0.000 0 0
1593 169628.998 G11 22447756.940 0 0 117963803.785 0 0 0.000 0
0 0.000 0 0
1593 169628.998 G14 22096609.520 0 0 116118456.058 0 0 0.000 0
0 0.000 0 0
1593 169628.998 G19 20574963.864 0 0 108122199.305 0 0 0.000 0
0 0.000 0 0
1593 169628.998 G22 20783906.467 0 0 0.000 3 0 0.000 0
0 0.000 0 0
1593 169628.998 G28 23463557.027 0 0 123301866.456 0 0 0.000 0
0 0.000 0 0
1593 169629.998 G03 22012570.798 0 0 115676748.734 0 0 0.000 0
0 0.000 0 0
I'm bit lost. Does this look sensible? Do I need more than RXM-RAW to
calculate my position? Perhaps ephemeris in some format? I would
greatly appreciate a step-by-step tutorial for newbies :-)
I have two identical receivers so I was hoping that if I keep one at a
fixed location I could use it to aid the moving receiver (perhaps over
WLAN?). Is this possible and are there command line tools for it?
best regards,
Timo Lindors
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