Nuri Rocket(KSLV-II) - 2023-05-25T09:24 - KASI SNIPE cubesats, LUMIR-T1, JLC-101-v1-2

KASI · May 25, 2023, 12:11pm

Hello, the 3rd launch of the Nuri has been carried out in Korea. The 3rd Nuri was equipped with several satellites, including four SNIPE Cubesats developed by KASI(Korea Astronomy and Space Science Institute).

Launch Vehicle : KSLV-II (Korean Space Launch Vehicle-II)

Launch Site : Naro Space Center

Launch Time : 2023-05-25T09:24:00Z (2023/May/25 09:24 UTC)
LTAN : 06:00 AM
Altitude : 550 km
Orbit : Dawn-Dusk Orbit (Sun-synchronous)
Object : Research ionosphere and magnetosphere for space science

UHF Downlink Freq for Beacon
KASISAT-A = 435.45 MHz
KASISAT-B = 436.00 MHz
KASISAT-C = 436.95 MHz
KASISAT-D = 437.80 MHz

TLE (NORAD ID is not decided yet)

KASISAT-A  (SNIPE_A)
1 10787U 23122A   23145.40170411  .00000000  00000-0  00000-0 0 00009
2 10787 097.5653 332.7107 0009112 315.8470 222.8474 15.07744707000016
KASISAT-B  (SNIPE_B)
1 10788U 23123A   23145.40193698  .00000000  00000-0  00000-0 0 00003
2 10788 097.5654 332.7110 0009126 316.1189 223.8385 15.07754005000012
KASISAT-C  (SNIPE_C)
1 10789U 23124A   23145.40222396  .00000000  00000-0  00000-0 0 00014
2 10789 097.5653 332.8984 0009112 315.8470 222.8474 15.07744707000012
KASISAT-D (SNIPE_D)
1 10790U 23124A   23145.40241244  .00000000  00000-0  00000-0 0 00019
2 10790 097.5655 332.7114 0009194 316.6833 225.8530 15.07779660000014

It is just fine to observe the signals by spectrum analyzer

I hope a lot of people will pay attention to it.
Please feel free for any questions.

PE0SAT · May 25, 2023, 12:38pm

Welcome and thanks for sharing this information.

Can you also provide information about what TLM will be transmitted and if there is preliminary TLE available

fredy · May 25, 2023, 12:39pm

Hi @KASI and welcome to the community!

Thank you for the information!

Can you give us more info about the date of the launch, any initial TLE sets?

Also is there an IARU coordination for these satellites? I don’t see any entry in IARU Sat Coordinator.

KASI · May 25, 2023, 12:46pm

Thanks, @fredy.

I am asking the technical team about the TLM set.

We registered the frequency with the ITU.
However, we couldn’t register because we just got to know IARU(and also this site ), and we are planning to register.

KASI · May 25, 2023, 12:48pm

Thanks, @PE0SAT

I am asking the technical team about the TLM.

PE0SAT · May 25, 2023, 12:51pm

And also please the initial TLE, orbital elements, without them we can’t track them.

KASI · May 25, 2023, 12:58pm

Ok, I’m trying to let you know.

fredy · May 25, 2023, 3:01pm

Satellite ID	Name	Temporary NORAD ID
AYLO-6910-6407-3496-4588	SNIPE-1	99162
KZDM-2447-6592-4881-9320	SNIPE-2	99161
ZNAY-2858-6600-3535-8759	SNIPE-3	99160
EOVQ-9559-0511-0103-2591	SNIPE-4	99159

Below are the TLE sets from the first post changed to use the temporary NORAD ID we use in DB:

SNIPE_A
1 99162U 23122A   23145.40170411  .00000000  00000-0  00000-0 0 00003
2 99162 097.5653 332.7107 0009112 315.8470 222.8474 15.07744707000010
SNIPE_B
1 99161U 23123A   23145.40193698  .00000000  00000-0  00000-0 0 00005
2 99161 097.5654 332.7110 0009126 316.1189 223.8385 15.07754005000014
SNIPE_C
1 99160U 23124A   23145.40222396  .00000000  00000-0  00000-0 0 00014
2 99160 097.5653 332.8984 0009112 315.8470 222.8474 15.07744707000012
SNIPE_D
1 99159U 23124A   23145.40241244  .00000000  00000-0  00000-0 0 00015
2 99159 097.5655 332.7114 0009194 316.6833 225.8530 15.07779660000010

I’ve scheduled observations for the next 48h.

Thanks @KASI for all the info!

EU1SAT · May 25, 2023, 4:07pm

SNIPE A, B, D RAW Telemetry

https://twitter.com/EU1SAT/status/1661764249000067072

PE0SAT · May 25, 2023, 4:10pm

SNIPE-1 and SNIPE-2 over South Africa

fredy · May 25, 2023, 4:14pm

There is a TLE set in space-track.org for this launch, probably the rocket body:

0 TBA - TO BE ASSIGNED
1 56743U 23072A   23145.58386102 -.00000061  00000-0  00000+0 0  9994
2 56743  97.5419 332.9072 0006535 304.1310 142.2373 15.07095207    29

KASI · May 25, 2023, 4:19pm

Thank you very much

j11 · May 25, 2023, 4:20pm

Does anyone knows when NORAD assign NORADID? after the launch? or average registration time?

PE0SAT · May 25, 2023, 4:22pm

The are decoded frames in the database.

An example:

4302800006C1E4E418000901C7E40025078100005BC20000050003030F0A140100A60D00470347032800A9FFB7FFE1FF00002056000000000000

fredy · May 25, 2023, 4:29pm

This is a 3-step process, the first is for NORAD to publish unassigned TLE sets for all the objects of this launch. The second is to assign the TLE to the objects. The third step is satellite teams and third party actors, like us, to identify which objects is which satellite based on the frequency and the doppler effect we observe in our observations.

This first step may take from 1 to 10 days, given they already published one TLE set, my guess is that we’ll have TLE for all of them soon. The second step usually takes 1-2 days (in more extreme cases ~7days) depending usually on the number of the deployed satellites and on how close/separated they are.

The third step it can also take 1-2 days up to 2-3 weeks or never, usually we are closer to the minimum. It depends on if the satellite transmits, if it transmits how close/separated is with other satellites/objects.

In this case, and with SNIPE satellites transmitting my guess would be 1 week to have NORAD IDs for them. Let’s see!

j11 · May 25, 2023, 4:38pm

thank you so much

KASI · May 25, 2023, 4:51pm

Thank you very much

fredy · May 25, 2023, 6:10pm

@KASI is there any link on how we can decode these received frames?

fredy · May 25, 2023, 6:16pm

More TLE published in space-track.org:

0 TBA - TO BE ASSIGNED
1 56743U 23072A   23145.58386102 -.00000061  00000-0  00000+0 0  9994
2 56743  97.5419 332.9072 0006535 304.1310 142.2373 15.07095207    29
0 TBA - TO BE ASSIGNED
1 56744U 23072B   23145.58402192 -.00000061  00000-0  00000+0 0  9993
2 56744  97.5308 332.8905 0007646 306.7491 140.4999 15.07126541    23
0 TBA - TO BE ASSIGNED
1 56745U 23072C   23145.58365449 -.00000062  00000-0  00000+0 0  9998
2 56745  97.5379 332.8953 0008084 309.1590 136.1792 15.07269505    20
0 TBA - TO BE ASSIGNED
1 56746U 23072D   23145.58428755 -.00000062  00000-0  00000+0 0  9999
2 56746  97.5542 332.9112 0007080 311.7412 137.1330 15.07367487    25
0 TBA - TO BE ASSIGNED
1 56747U 23072E   23145.57749841 -.00000062  00000-0  00000+0 0  9991
2 56747  97.5569 332.9063 0005465 317.8784  94.3022 15.07514801    20
0 TBA - TO BE ASSIGNED
1 56748U 23072F   23145.58424130 -.00000062  00000-0  00000+0 0  9994
2 56748  97.5338 332.9138 0011808 314.2099 134.5122 15.07588424    26
0 TBA - TO BE ASSIGNED
1 56749U 23072G   23145.57833029 -.00000062  00000-0  00000+0 0  9995
2 56749  97.5400 332.9085 0012321 317.9142  98.8341 15.07706939    26
0 TBA - TO BE ASSIGNED
1 56750U 23072H   23145.58335565 -.00000066  00000-0  00000+0 0  9994
2 56750  97.5254 332.9052 0023383  18.6458  67.9002 15.11798253    20

KASI · May 25, 2023, 6:30pm

Let me ask about that