ISS Cubesat Deployment (JAXA) J-SSOD#26 - 2023-07-19 06:40 UTC

fredy · July 19, 2023, 7:49am

Calling all amateur radio community members!

Connect with our Maya-5 and Maya-6 cube satellites starting tomorrow. Here’s how:

Track the Maya-5 (DX5MYA) and Maya-6 (DX6MYA) CubeSats and listen to their Morse-coded CW beacon at 437.375 MHz which will be transmitted by the satellites 30 minutes after release.

The two-line elements (TLE) of the satellites will be available only after deployment, so initially the TLE of ISS (NORAD ID 49274) may be used.

With the received CW beacon, know its status using the Birds-4 CW Decoder software that you can download through: BIRDS4 CW decoder - Google Drive.

Submit your decoded data through this google forms link: https://forms.gle/JXrXruPM91g7ErkY8.

All amateur radio community members are encouraged to participate in tracking #Maya5 and #Maya6! As a humble token of appreciation, we will send you a QSL card in return.

More info on the satellites here: https://stamina4space.upd.edu.ph/maya-5-and-maya-6/

Maya-5 and Maya-6 cube satellites are set to be deployed from the International Space Station (ISS) on 19 July 2023 around 3:00 p.m. Philippine time.

The deployment will be live streamed via the JAXA (Japan Aerospace Exploration Agency)'s YouTube channel. The program will start at 2:40 p.m. PST: https://www.youtube.com/watch?v=0kci4493p2Q

Read more: https://humans-in-space.jaxa.jp/…/b…/news/detail/003229.html

fredy · July 19, 2023, 7:52am

Both satellite are added in DB:

https://db.satnogs.org/satellite/BSOI-4945-7290-6798-4904
https://db.satnogs.org/satellite/DWOE-5467-4122-7963-0240

and are scheduled in Network.

Have in mind that we use the ISS TLE set for tracking them, so if you schedule observations please leave passes/observations for ISS.

fredy · July 19, 2023, 9:27am

We have some CW reception, it is not clear if they are coming from Maya-5 or Maya-6 or both. From an attempt to decode the CW I get something like TRASHMAYA.

fredy · July 19, 2023, 4:40pm

Both satellites were received and partially decoded in these two observations:

https://network.satnogs.org/observations/7888887/
https://network.satnogs.org/observations/7887205/

fredy · July 19, 2023, 6:21pm

Here are TLE sets generated by @PE0SAT:

MAYA-5
1 99062U          23200.44346927  .00000000  00000-0  81866-3 0    07
2 99062  51.6410 169.0142 0000800  22.7170 122.6461 15.49889810    00
MAYA-6
1 99061U          23200.44346927  .00000000  00000-0  81866-3 0    06
2 99061  51.6410 169.0142 0000800  22.7170 122.6461 15.49889810    09

Also it seems that both has drifted frequency ~2KHz

fredy · July 19, 2023, 8:08pm

One more TLE based on more recent observations by @PE0SAT:

MAYA-5
1 99062U          23200.80000000  .00000000  00000-0  81866-3 0    06
2 99062  51.6410 166.7380 0000775  34.2662 302.1191 15.50607805    02
MAYA-6
1 99061U          23200.80000000  .00000000  00000-0  81866-3 0    05
2 99061  51.6410 166.7380 0000775  34.2662 302.1191 15.50607805    01

PE0SAT · July 20, 2023, 8:49pm

Decoded FSK from one of the MAYA satellites:

0000: C0 00 44 58 31 53 41 54 30 44 58 35 4D 59 41 30 
0010: 3E F0 FF F0 FF 00 00 01 FF FF FF FF FF FF FF FF 
0020: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
0030: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
0040: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
0050: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
0060: FF FF FF FF FF FF FF FF FF C0 

À.DX1SAT0DX5MYA0>ðÿðÿ...ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÀ
**********************************************************�t*�㡪t*�㡬t*

fredy · July 20, 2023, 9:25pm

New TLE sets by @PE0SAT:

MAYA-5
1 99062U          23200.88369213  .00000000  00000-0  18215-3 0    06
2 99062  51.6406 166.7387 0000391  85.9897 357.6830 15.50550183    02
MAYA-6
1 99061U          23200.88369213  .00000000  00000-0  18215-3 0    05
2 99061  51.6406 166.7387 0000391  85.9897 357.6830 15.50550183    01

fredy · July 21, 2023, 4:20pm

There are two new TLE sets by space-track.org, still in TBA status:

0 TBA - TO BE ASSIGNED
1 57419U 98067VW  23202.03707367  .00056721  00000-0  97239-3 0  9992
2 57419  51.6400 160.7954 0002988 175.2368 231.0052 15.50639652   280
0 TBA - TO BE ASSIGNED
1 57420U 98067VX  23202.03726203  .00054758  00000-0  93832-3 0  9997
2 57420  51.6395 160.7961 0002860 176.4169 231.0619 15.50667429   286

I’ve assigned to follow 57419 for Maya-5 and 57420 for Maya-6, but we will need some time for the TLE to be assigned and for the satellites being separated in order to identify them.

KD9KCK · July 25, 2023, 11:03pm

Based on this observation SatNOGS Network - Observation 7917767 which should be tracking Maya-5 it seems we should flip the tracked TLE between Maya-6 and Maya-5.

Since Maya-6’s CW appears to be straight / tracked for doppler properly in the observation, and Maya-5’s CW appears to have doppler.

fredy · July 26, 2023, 6:15am

Thanks for the analysis, I’ve swapped the NORAD IDs we follow for each object. Let’s get a couple more observations to verify it and then let’s identify them.

For some reason it seems that space-track.org has identified 57419 as Maya-5, probably seems to be a mis-identification.

KD9KCK · July 28, 2023, 4:35pm

https://network.satnogs.org/observations/7919629/

Shows that our swap was correct.

First bit of CW in this image that is not doppler shifted is

TRASHMAYA05DX5MYA000000E000

The second one, that is doppler shifted is

TRASHMAYA06DX6MYA000000E400

The third one, that is not doppler shifted is

TRASHMAYA05DX5MYA000000E000

fredy · August 6, 2023, 3:54pm

Both satellites are now identified:

MAYA-5 is 57420, ikhnos results
MAYA-6 is 57419, ikhnos results

Currently In both Celestrak and space-track.org MAYA-5 is mid-identified as 57419.

Thanks to @KD9KCK who helped on the identifications.