2024-08-29 09:20 UTC and 11:00 UTC: ISS Cubesat Deployment (JAXA) J-SSOD#31 - [CosmoGirl-Sat, SaganSat0, SAKURA, Wisseed Sat, Binar-2, -3, -4]

HS318 · August 31, 2024, 9:14pm

Hi Fredy,

Please can you check the tle for SaganSat0 I’ve tried loading it to Orbitron but it would not display.
Looking at the tle I think this should be a 0 and not a 4 as when changing it to 0 it then works in Orbitron.

dl7ndr · August 31, 2024, 10:05pm

Confirmed.

Even if line 1 has a correct checksum according to vCalc using “4____08” at the end, also Gpredict won’t display SaganSat0.

Change it to “0____04” and it will work.

fredy · August 31, 2024, 10:17pm

You are right, I’m copying Sakura TLE for SaganSat0 and it looks like that I have a copy paste error somewhere. I’ve fixed it in the post above and in the next minutes it will be fixed in both DB and Network.

Thanks for letting me know!

HS318 · August 31, 2024, 10:42pm

No problem, happy to help.

EU1SAT · September 1, 2024, 1:13am

vk6tpw · September 1, 2024, 1:28am

Hi EU1SAT,

Thank you for all your work. Could I ask what TLE you are using? Satnogs TLE? We are trying to verify what TLE is the most accurate to use.

Thank you for sharing this Beacons, we will add them to our database. Where would we be able to get the data? Thank you

Regards, Tristan
Binar

EU1SAT · September 1, 2024, 1:38am

I used TLE from SatNOGS DB with manual correction, but the shift is already more +3000 Hz

vk6tpw · September 1, 2024, 1:48am

Thank you, would you be uploading the data to satnogs?

EU1SAT · September 1, 2024, 1:52am

Data I uploaded to SatNOGS DB

https://db.satnogs.org/satellite/FACZ-7987-8249-5385-5279#data

https://db.satnogs.org/satellite/EHBA-7491-4486-7496-1223#data

https://db.satnogs.org/satellite/WJHX-1326-6381-8250-7903#data

To download the data you need to log in

vk6tpw · September 1, 2024, 2:02am

Ok, maybe the server took a bit to update. I could not find the data but after some refreshing it appeared. I am still waiting on binar 3. Thank you again.

vk6tpw · September 1, 2024, 2:10am

Hi, the zip file seems to contain a .exe file. was this the intention? is there a chance you could upload the bytes in some other format such as text?

EU1SAT · September 1, 2024, 2:15am

https://db.satnogs.org/api/telemetry/?satellite=98807&app_source=&observer=&transmitter=&is_decoded=&sat_id=&start=&end=

vk6tpw · September 1, 2024, 3:17am

Hi EU1SAT, Thank you for that. Maybe I was looking in the wrong place it seems. Thanks again for tracking and demodulating. Very helpful.

fredy · September 2, 2024, 4:31am

New TLE sets for all the satellites:

Sakura
1 99196U          24245.60000000  .00000000  00000-0 -13037-2 0    07
2 99196  51.6396 296.6709 0010444 166.2144 167.1605 15.50344221    05
SaganSat0
1 98810U          24245.60000000  .00000000  00000-0  36833-3 0    08
2 98810  51.6391 297.1174 0013796 308.0894  24.6305 15.50465888    02
CosmoGirl-Sat
1 98811U          24245.60000000  .00000000  00000-0  36833-3 0    09
2 98811  51.6391 297.1174 0013796 308.0894  24.6305 15.50465888    03
Binar-2
1 98808U          24245.60000000  .00000000  00000-0  42798-3 0    02
2 98808  51.6396 303.6180 0011246 168.3207 160.9049 15.49395767    02
Binar-3
1 98807U          24245.60000000  .00000000  00000-0  42798-3 0    01
2 98807  51.6396 296.1891 0006846  72.1491 260.6782 15.50567383    02
Binar-4
1 98806U          24245.60000000  .00000000  00000-0  42798-3 0    00
2 98806  51.6396 296.1143 0011288 165.4224 166.7037 15.50720933    08

Notes:

The previous one for Binar-2 was pretty off. The new one is much better but it will need more observations to fit better
TLE of SaganSat0 is based on ComsoGirl-Sat one as we haven’t any reception from SaganSat0 until now

fredy · September 2, 2024, 11:00am

One more fitted TLE set:

Binar-2
1 98808U          24246.30000000  .00000000  00000-0  42798-3 0    00
2 98808  51.6396 291.6328 0010903 173.4478 110.4524 15.50836004    02

fredy · September 2, 2024, 11:05pm

TLE updates by @PE0SAT:

SAKURA
1 99196U          24246.12858796  .00000000  00000-0 -13037-2 0    08
2 99196  51.6396 293.9107 0010149 170.7688 235.5523 15.50884512    03

COSMOGIRL-SAT
1 98811U          24246.12858796  .00000000  00000-0  36833-3 0    00
2 98811  51.6390 294.5218 0013796  45.7903 359.3552 15.49654886    06

dl7ndr · September 3, 2024, 5:36am

SAKURA: How to obtain a QSL card:

https://twiiit.com/CitGardens/status/1828300181261164953

vk6drd · September 3, 2024, 8:55am

Thank you for all the observations and TLE determination for Binar-2, 3, and 4! It has been incredibly helpful so far!

Judging from the successful passes, there have been many observations of Binar-2, 3, and 4, but no data demodulated. Wondering if there is anything we can do to make that possible?

fredy · September 4, 2024, 1:03am

New TLE sets,

SAKURA
1 99196U          24247.60000000  .00000000  00000-0 -13413-2 0    07
2 99196  51.6396 286.6451 0004930  39.5832 306.6295 15.50804785    08
SaganSat0
1 98810U          24247.60000000  .00000000  00000-0  14977-2 0    04
2 98810  51.6391 287.0482 0010937 314.0972  30.6587 15.50744369    03
CosmoGirl-Sat
1 98811U          24247.60000000  .00000000  00000-0  14977-2 0    05
2 98811  51.6391 287.0482 0010937 314.0972  30.6587 15.50744369    04
Binar-2
1 98808U          24247.60000000  .00000000  00000-0  42798-3 0    04
2 98808  51.6396 286.3901 0010903  57.4705 289.2045 15.51188206    02
Binar-3
1 98807U          24247.60000000  .00000000  00000-0  42798-3 0    03
2 98807  51.6396 286.7291 0006594  77.5539 268.9667 15.51094991    07
Binar-4
1 98806U          24247.60000000  .00000000  00000-0  59519-3 0    01
2 98806  51.6396 286.9926 0002540  89.2899 255.4768 15.50959053    00

Notes:

TLE of SaganSat0 is based on ComsoGirl-Sat one as we haven’t any reception from SaganSat0 until now

fredy · September 4, 2024, 1:11am

Below are the possible reasons for not demodulating:

The SNR isn’t good enough for the demodulator script
The demodulator script that runs in stations isn’t the right one for the modulation Binar satellites use

Given that there are some observations that show a good SNR on waterfall, probably is the second reason. Maybe @surligas @PE0SAT or @SA2KNG that are more familiar with demodulators scripts can help us to figure it out.