First STRF checks:
K-HERO seems to be active on 437.180 and not 437.165
K-HERO
1 98489U 25331.07818638 .00000000 00000-0 50000-4 0 05
2 98489 97.7900 258.8600 0000717 0.0000 125.9397 14.92727873 02
# 20251127.01-20251127.08, 34 measurements, 0.072 kHz rms
SNUGLITE-III beacon structure [2025.11.26] SNUGLITE-III Beacon Structure | SNU GNSS Laboratory
Jan | PE0SAT
SNUGLITE-III HANA
The signals aren’t very strong over Europe
SNUGLITE-III HANA
1 98496U 25331.53333537 .00000000 00000-0 50000-4 0 04
2 98496 97.7900 258.8556 0000717 0.0000 51.0993 14.95170608 02
# 20251127.47-20251127.53, 12 measurements, 0.139 kHz rms
Jan | PE0SAT
SPIRONE
SPIRONE
1 98492U 25331.53369996 .00000000 00000-0 50000-4 0 08
2 98492 97.7900 258.9891 0000717 0.0000 50.9212 14.91953691 00
# 20251127.47-20251127.53, 21 measurements, 0.149 kHz rms
INHA-ROSAT
INHA-ROSAT
1 98490U 25331.53393606 .00000000 00000-0 50000-4 0 01
2 98490 97.7900 259.2495 0000717 0.0000 50.8313 14.89340176 08
# 20251127.53-20251127.54, 12 measurements, 0.072 kHz rms
Jan | PE0SAT
First of all, thank you all.
I’m managing the K-HERO mission right now, and SatNOGS’ network observation greatly improved our initial orbit operation.
It looks like the UPDATED TLE’s altitude shows approximately 590 km, whereas based on K-HERO GPS data (included in beacon), it is approximately 588.3 km. It looks like the altitude is different from what I’ve noticed from the launcher side (~ 600 km).
@PE0SAT Which method did you use to update TLE, is it based on RF signal observation data?
Best,
Welcome on the channel, it always great to see mission members.
We use STRF for Doppler measurements and create TLE from those,
Ideally we would use multiple passes and then fine tune the TLE, in this case where there was nothing publicly available we used Epoch, Inclination, orbit and launch location.
I had a look at https://www.space-track.org/ but there is nothing available yet so we will try to update the current ones.
If you can share more details on its orbit, state vectors or preliminary TLE please do.
Jan | PE0SAT
Hello,
I am in charge of communications for INHA RoSAT.
Thanks to your support, we are successfully monitoring the status of our satellite. We sincerely appreciate your help.
Based on the received GPS data, we reconstructed an updated TLE. We are currently observing about a 2-minute difference compared to the SatNOGS-predicted pass, and we have confirmed signal reception that matches our updated estimation.
We would appreciate it if you could reflect this new TLE.
INHA RoSAT
1 99999U 1800100 25331.80246389 .00000000 00000-0 25992-3 0 9999
2 99999 97.7444 259.2713 0001305 357.3743 54.4032 14.91727050 17
Thank you again for your support.
The TLE changed to use the temporary NORAD ID we use in DB:
INHA RoSAT
1 98490U 25331.80246389 .00000000 00000-0 25992-3 0 9994
2 98490 97.7444 259.2713 0001305 357.3743 54.4032 14.91727050 12
@fredy Thank you for updating the TLE.
Thanks to your support, we have been able to continuously confirm that the signal is being received properly.
For those attempting to receive our satellite’s signal, we would like to share some additional information about INHA RoSAT.
To reduce power consumption, the satellite is currently transmitting only the Audio Beacon.
As shown in the waterfall, the Audio Beacon is visible when transmitted, and it is emitted every 5 minutes.
We would like to once again express our sincere gratitude to everyone who has been receiving and tracking our signal. Thank you!
@jociiiii Thank you for the info!
I may suggest, if possible, you change the interval to 3min, this way we can have 2 to 3 points in each pass that can help us identify the satellite.
By the way we have assigned TLE from space-track for this launch for all the expected objects, so we can start the identification process.
0 OBJECT A
1 66650U 25274A 25333.20177411 .00001671 00000-0 17204-3 0 9994
2 66650 97.7378 260.6402 0010697 303.2303 56.7890 14.91585531 381
0 OBJECT B
1 66651U 25274B 25333.20168531 .00002593 00000-0 26341-3 0 9994
2 66651 97.7366 260.6400 0011042 302.4766 57.5384 14.91639250 381
0 OBJECT C
1 66652U 25274C 25332.32945814 .00001430 00000-0 14724-3 0 9995
2 66652 97.7376 259.7852 0010856 312.4916 47.5385 14.91788681 252
0 OBJECT D
1 66653U 25274D 25332.26221872 .00001418 00000-0 14521-3 0 9991
2 66653 97.7326 259.7196 0009575 324.7926 35.2659 14.92039319 247
0 OBJECT E
1 66654U 25274E 25331.52445602 .00001313 00000-0 13508-3 0 9997
2 66654 97.7383 258.9963 0012320 312.3234 47.6940 14.91950445 130
0 OBJECT F
1 66655U 25274F 25333.13407584 .00003040 00000-0 30538-3 0 9995
2 66655 97.7373 260.5753 0012201 306.4109 53.5984 14.91960566 374
0 OBJECT G
1 66656U 25274G 25333.20084307 .00003290 00000-0 32848-3 0 9991
2 66656 97.7369 260.6413 0012879 307.5870 52.4178 14.92139275 382
0 OBJECT H
1 66657U 25274H 25333.20055544 .00003244 00000-0 32263-3 0 9993
2 66657 97.7367 260.6418 0011580 326.2866 33.7616 14.92319714 384
0 OBJECT J
1 66658U 25274J 25333.20025741 .00002996 00000-0 29701-3 0 9996
2 66658 97.7368 260.6423 0012188 328.8358 31.2137 14.92496768 387
0 OBJECT K
1 66659U 25274K 25333.19994443 .00003154 00000-0 31089-3 0 9998
2 66659 97.7370 260.6425 0012947 329.8933 30.1541 14.92682495 387
0 OBJECT L
1 66660U 25274L 25333.19969424 .00003711 00000-0 36335-3 0 9999
2 66660 97.7370 260.6431 0013565 330.1871 29.8574 14.92831648 386
0 OBJECT M
1 66661U 25274M 25333.19942728 .00002576 00000-0 25295-3 0 9999
2 66661 97.7370 260.6434 0014219 330.9976 29.0452 14.92987976 384
0 OBJECT N
1 66662U 25274N 25333.19930421 .00001590 00000-0 15795-3 0 9996
2 66662 97.7378 260.6434 0014611 330.6795 29.3604 14.93058196 381
0 KSLV-II R/B
1 66663U 25274P 25332.25598398 .00001870 00000-0 16348-3 0 9992
2 66663 97.7400 259.7351 0045467 6.3451 353.8337 14.97233772 246
Thanks for providing detailed information.
Below is the state vector of K-HERO which I received from launcher.
Lift Off Time: 2025/11/26 16:12:59.915 (UTC)
SAT Separation Time: 2025/11/26 16:27:35.475 (UTC)
Mission Elapsed Time: 875.56 s — From lift-off to separation
Position (ECEF Coordinates):
• X Position: −4060.7639 km
• Y Position: 5672.6250 km
• Z Position: 174.8205 km
Velocity (ECEF Coordinates):
• X Velocity: 1132.475 m/s
• Y Velocity: 1043.993 m/s
• Z Velocity: −7484.112 m/s
Attitude (321 Euler Angles w.r.t LVLH Coordinates):
• X Attitude: −89.46 deg
• Y Attitude: 36.48 deg
• Z Attitude: −173.82 deg
Angular Rate (Body-Fixed Coordinates):
• X Angular Rate: 0.25 deg/s
• Y Angular Rate: 0.08 deg/s
• Z Angular Rate: 0.47 deg/s
Hope this data helps.
Best,
FYI, K-HERO sometimes fell into safe (low power) mode, which turned off the auto beacon. My team is currently working on this matter. 
SatNOGS’ observations greatly helps!!!
