Dataset Open Access

RF recordings of GPS SVN49 broadcasting non-standard codes

Estévez, Daniel

This dataset consists of several recordings of the L1 signal broadcasted by GPS
SVN49 between 2019-06-26 and 2019-06-28. This satellite broadcasts a
non-standard code as its L1 C/A signal, where the usual spread-spectrum PRN is
replaced by a PRN which consists of alternating zeros and ones (akin to a square
wave subcarrier). This produces strong spectral lines at +/-511.5kHz from the L1
centre frequency.

The signal is modulated with a navigation message in the usual way using 50baud
BPSK.

The recordings have been made with a LimeSDR using an external 10MHz GPSDO and a
small and inexpensive GPS patch antenna.

Included files

The .bin files contain waterfall data generated with STRF. This
data can be used to identify the satellite producing the signal using Doppler
measurements.

The mjd58660.dat file contains Doppler measurements extracted with STRF.

The .c64 files are IQ recordings of the upper sideband of
the modulation (centred at L1 + 511.5kHz). One of them is done at 5ksps and
another at 10ksps. The timestamp of the start of each recording is indicated in
the filename. The format is complex IQ data as 32-bit floats.

Files (12.8 GB)
Name Size
2019-06-25T17:29:03_000000.bin
md5:4e780d4e531b4bdd1736b501e6a9799f
48.0 MB Download
2019-06-25T17:29:03_000001.bin
md5:89d5c8f04e539f3f4545001ae37d97e9
48.0 MB Download
2019-06-25T17:29:03_000002.bin
md5:6f028e8d6ca9a00eae8aee03f5783e61
4.8 MB Download
2019-06-25T20:59:36_000000.bin
md5:e8a88d20b13531a9518ce80deed422ad
48.0 MB Download
2019-06-25T20:59:36_000001.bin
md5:2b21b10f3eda1548a20f93ab0cfa329d
48.0 MB Download
2019-06-25T20:59:36_000002.bin
md5:12db939f5f1a7ad33ca9a7b12c9d6d0e
48.0 MB Download
2019-06-25T20:59:36_000003.bin
md5:53f47db2f69d37a180985f155ab309e6
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2019-06-25T20:59:36_000004.bin
md5:9ca42bd1432bcf3550306f28349ae864
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2019-06-25T20:59:36_000005.bin
md5:01618318e4938f237bd8802264d8febf
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2019-06-25T20:59:36_000006.bin
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2019-06-25T20:59:36_000007.bin
md5:682f24bbe1ff50a75a677c0ea4ca1a41
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2019-06-25T20:59:36_000008.bin
md5:b46ce49250b775e34c2fc4f0c438ba04
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2019-06-25T20:59:36_000009.bin
md5:b4e4cc6feadd1958043f3456fe2049cb
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2019-06-25T20:59:36_000010.bin
md5:b1dabd826986ac0773863f132671acd7
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2019-06-25T20:59:36_000011.bin
md5:68af90a0aa5ecd141f171077cf358a8b
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2019-06-25T20:59:36_000012.bin
md5:884bb180efe791e942494ab2fa8479ae
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2019-06-25T20:59:36_000013.bin
md5:c691a6a7383df1088aec2f27f9dec6c7
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2019-06-25T20:59:36_000014.bin
md5:2967619eea3e0112a3f596056cb1c76e
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2019-06-25T20:59:36_000015.bin
md5:c2e0892a187bebb9a0fd0cfbd5b1b13e
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2019-06-25T20:59:36_000016.bin
md5:fa08c0811a8fd97a8289b089aa37fd28
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2019-06-25T20:59:36_000017.bin
md5:f7f86a16178b5017fd927dccff87d389
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2019-06-25T20:59:36_000018.bin
md5:d7239dddef895879eb1f41265ea6a2d9
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2019-06-25T20:59:36_000019.bin
md5:4c3172a11775f57f025a9a9fc52c5722
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2019-06-25T20:59:36_000020.bin
md5:90849b0486f10d3ce8d25b7978372916
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2019-06-25T20:59:36_000021.bin
md5:44446b8a69e1c66ec6c793622a9e2e69
48.0 MB Download
2019-06-25T20:59:36_000022.bin
md5:15ee4419f672ff279e1a4c2c23efc87f
43.2 MB Download
2019-06-27T16:52:22_000000.bin
md5:4d766d92c18bd39ae639c0763e5a3759
48.0 MB Download
2019-06-27T16:52:22_000001.bin
md5:086af1c8eb09e645710577195061c77d
48.0 MB Download
2019-06-27T16:52:22_000002.bin
md5:16676241b3fa4bae02198b1c27507ea7
48.0 MB Download
2019-06-27T16:52:22_000003.bin
md5:64ecff1347e56ac229a553b72bf2948e
48.0 MB Download
2019-06-27T16:52:22_000004.bin
md5:1f6c39e95f8e09310ac45370ea5a615b
48.0 MB Download
2019-06-27T16:52:22_000005.bin
md5:4237dcb8c363dd8d5ff52e7e8e0d89ef
48.0 MB Download
2019-06-27T16:52:22_000006.bin
md5:d4552f1736c7fe771b3659b5b2f3cc82
48.0 MB Download
2019-06-27T16:52:22_000007.bin
md5:80b80deec33b6f4806ee31fe46f9c864
48.0 MB Download
2019-06-27T16:52:22_000008.bin
md5:cd32dd5738e4408dfa82bd9a72dacdce
48.0 MB Download
2019-06-27T16:52:22_000009.bin
md5:de4ea844063dacd02336819ded139a14
48.0 MB Download
2019-06-27T16:52:22_000010.bin
md5:fb1eb51b02b7536084441726cd3e2a73
48.0 MB Download
2019-06-27T16:52:22_000011.bin
md5:900ffcc3a6f8d5b12101fcef0e68d33d
22.4 MB Download
mjd58660.dat
md5:6b359b101c5de38845300f3737f9f2f3
10.5 kB Download
README.md
md5:827d064e40b5e6c9c23e0b54a7b22100
1.2 kB Download
usb_modulation_2019-06-25T20:59:41.378538_5ksps.c64
md5:8255cc0bd29fc0016028708360046b25
5.5 GB Download
usb_modulation_2019-06-27T16:52:26.950376_10ksps.c64
md5:eadff920079797f87d1059718f8e88cb
5.5 GB Download
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Data volume 25.6 GB25.6 GB
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