kopia lustrzana https://github.com/Hamlib/Hamlib
48 wiersze
1.8 KiB
Plaintext
48 wiersze
1.8 KiB
Plaintext
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10-AUG-2020 Matthew J. Wolf Email: mwolf at speciosus.net
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I wanted to use Hamlib with my Amsat Tricked-Out WRAPS satellite antenna
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rotator [1],[2] with Hamlib and gpredict. During testing I discovered that the
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WARPS implementation of EASYCOMM I rotator protocol is not correct.
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The EASYCOMM I specification states "The Az and El values (aaa.a and eee.e)
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are not fixed width."
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The WRAPS EASYCOMM implementation is FIXED WIDTH! The WRAPS does not work with
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Hamlib's correct implementation of the EASYCOMM protocol.
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WARPS is expecting a zero padded number for the Az and El values. Leading
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zeros need to be added.
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Example for Az of 99 and El of 10:
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WARPS:
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AZ099.0 EL010.0 UP000 XXX DN000 XXX
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EASYCOMM I:
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AZ99.0 EL10.0 UP000 XXX DN000 XXX
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The SAEBRTrack rotator backend is a hack of the Hamlib EASYCOMM rotator
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backend. I copied EASYCOMM backend and removed what was not needed.
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I named the Hamlib rotator backend SAEBRTrack because that is the rotator
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protocol that is used with the WRAPS in the Microsoft windows pcsat32 program.
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The SAEBRTrack rotator backend only supports changing the rotor's Az and El.
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I have tested the rotator backend for Az and El changes with my Amsat WRAPS.
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The backend should work with original SAEBRTrack [3] and derivatives.
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The specification of EASYCOMM I protocol the are in the easycomm.txt file in
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the EASYCOMM rotator backend source directory
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References:
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[1] M. Spencer.
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WRAPS Rotor Enhancements Add a Second Beam and Circular Polarization".
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The AMSAT Journal. vol. 37, no. 3, pp. 25 to 31. 2014.
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[2] Amsat.org, 2020. [Online].
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Available: https://www.amsat.org/wordpress/xtra/WRAPSArticlewithStoreAd.pdf.
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[Accessed: 10 Aug 2020].
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[1]"saebrtrack - marklhammond", Sites.google.com, 2020. [Online].
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Available: https://sites.google.com/site/marklhammond/saebrtrack.
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[Accessed: 10 Aug 2020].
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