42 lines
1.3 KiB
Text
42 lines
1.3 KiB
Text
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### THESE ARE NOTES FROM PREVIOUS WORK, KEPT FOR REFERENCE. NONE OF THESE STEPS ARE REQUIRED TO USE THE GPS DATA PROCESSING SCRIPTS IN THE PARENT DIRECTORY.
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## Download the CRX2RNX tool precompiled binary
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# Download the pre-compiled Linux binary
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cd /tmp
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wget https://terras.gsi.go.jp/ja/crx2rnx/RNXCMP_4.2.0_Linux_gcc_64bit.tar.gz
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# Extract
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tar -xzf RNXCMP_4.2.0_Linux_gcc_64bit.tar.gz
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# Install to system path
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sudo cp RNXCMP_4.2.0_Linux_gcc_64bit/CRX2RNX /usr/local/bin/
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# Make executable
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sudo chmod +x /usr/local/bin/CRX2RNX
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# Create lowercase symlink (rnx2rtkp looks for lowercase)
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sudo ln -s /usr/local/bin/CRX2RNX /usr/local/bin/crx2rnx
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# Test
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crx2rnx -h
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## Download CORS corrections from here: https://www.ngs.noaa.gov/CORS/
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## If base station CORS files are compressed (.25d format), decompress them
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ls msin*.25d | xargs -n 1 -P 4 crx2rnx
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## Combine base station observations into one file
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./combine_rinex.sh msin_combined.obs msin*.25o
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## Perform corrections on a .obs file using base station files as reference
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cd CORS\ STATION\ MSIN\ NOV\ 2025/
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rnx2rtkp \ -t -u \
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-o ../../A/DATA/result.pos \
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../../A/DATA/20251120_033544.006_UTC_GPS_A_combined.obs \
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msin_combined.obs \
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../../A/DATA/20251120_033544.006_UTC_GPS_A_combined.nav
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## The result.pos file now contains PPK corrected GPS data in LLH format
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