New TLE sets by @pierros using strf toolkit :
SiriusSat-1
1 43595U 20339.50000000 .00000000 00000-0 56251-3 0 03
2 43595 51.6154 125.5749 0008051 226.2673 238.1460 16.13640511 07
SiriusSat-2
1 43596U 20339.45833333 .00000000 00000-0 57179-3 0 01
2 43596 51.5972 126.6362 0000007 129.7188 44.2739 16.13565242 01
Fresh TLE sets!
SiriusSat-1
1 43595U 20340.25000000 .00000000 00000-0 56251-3 0 07
2 43595 51.6153 121.4863 0000000 251.1845 254.2661 16.15836003 09
SiriusSat-2
1 43596U 20340.25000000 .00000000 00000-0 57179-3 0 08
2 43596 51.5972 122.3190 0000000 60.2705 37.7527 16.15170016 05
We will try to update those every 12h . Let’s see how this goes!
@sputnix please let us know if those are working for you. We would love to live chat with the team too (join us on https://app.element.io/?#/room/#satnogs:matrix.org )
Today AMSAT/CelesTrak/SpaceTrack/NORAD TLEs got updated. So we used them. Tomorrow fresh ones will be better most probably. We got @sputnixru matrix account, so we are online at least until reentry and next time we launch hopefully :). Thanks again for all your work!
A better set by @cgbsat:
SiriusSat-1
1 43595U 20340.50000000 .00000000 00000-0 87254-3 0 02
2 43595 51.5160 120.1507 0000854 292.6364 227.3083 16.15636907 00
# 20201202.39-20201205.43, 71 measurements, 0.150 kHz rms
SiriusSat-2
1 43596U 20340.50000000 .00000000 00000-0 90945-3 0 04
2 43596 51.6204 121.0530 0009148 334.8030 138.3763 16.16066830 00
# 20201202.33-20201205.44, 103 measurements, 0.160 kHz rms
EDIT: just to clarify that these TLE sets have adjusted more parameters than the previous and are based on more observations.
The following TLEs are now in the network, thanks @fredy!
SiriusSat-1
1 43595U 20341.51000000 .00000000 00000-0 91199-3 0 07
2 43595 51.5478 114.2873 0001000 270.6654 13.3037 16.18603740 08
# 20201204.31-20201206.36, 54 measurements, 0.156 kHz rms
SiriusSat-2
1 43596U 20341.51000000 .00000000 00000-0 92147-3 0 02
2 43596 51.6332 115.6587 0001000 334.3330 264.0094 16.19060956 00
# 20201204.32-20201206.36, 64 measurements, 0.132 kHz rms
These TLEs were generated using my STRF tools (GitHub - cbassa/strf: Radio Frequency Satellite Tracking). On my SatNOGS stations (#39 and #40) I have modified the satnogs-flowgraphs by adding a UDP sink directly after the SDR source block. This UDP sink streams the raw IQ data on the local network and gets fed into STRF using netcat and a local fifo. These commands are started using a pre-observation script, which also starts the STRF rffft command to create timestamped waterfalls. Hence, for each SatNOGS observation I also get a timestamped waterfall.
From the timestamped waterfalls, the time and frequency of the SiriusSat beacons are measured and stored. These measurements make up the Doppler curves, and with Doppler curves covering a few days, a new TLE is fitted.
This is a comparison of this mornings Doppler curves against the CSpOC TLE:
Newer TLE for SiriusSat-2
1 43596U 20343.56000000 .00000000 00000-0 57179-3 0 05
2 43596 51.6505 104.1511 0005170 35.3274 311.0149 16.32208751 05
Satellites now are marked as re-entered.
May they rest in peace.