NRCSD29 - ISS Satellites Deployment - 2025-12-02 08:28 UTC

Live stream of the deployment: https://www.youtube.com/watch?v=lIFdCA7Ow3w

Satellites that will be deployed:
Deployment 1 - DUPLEX (6U): 3:10am ET (8:10 GMT)
Deployment 2 - SilverSat (1U), RHOK-SAT (1U), ContentCube (1U), Alpha (1U): 3:20am ET (8:20 GMT)
Deployment 3 - EagleSat-2 (3U), Foras Promineo (3U): 4:50am ET (9:50 GMT)


last update: 2025-12-02 08:00 UTC

Temporary NORAD ID Satellite Frequency Notes Deployed
AMATEUR UHF
99932 RHOK-SAT 435.425 MHz IARU Coordinated Directly from ISS
98468 ContentCube 437.020 MHz IARU Coordinated Directly from ISS
98912 EagleSat-2 437.165 MHz IARU Coordinated Directly from ISS
98538 SilverSat 437.175 MHz IARU Coordinated Directly from ISS
98465 Foras Promineo 437.400 MHz IARU Coordinated Directly from ISS
IN DB WITHOUT FREQUENCIES
98463 DUPLEX - Only Iridium TX/RX Directly from ISS
NOT IN DB
- ALPHA (CU-ALPHA) - LoRa at 915MHz Directly from ISS

last update: 2025-12-02 08:00 UTC



Silversat according to New users welcome - #590 by davecopela is going to be launched from ISS at 2025-12-02 08:28 UTC.

@davecopela can you share if other satellites will be deployed at the same time?

I guess the satellite will be deployed by Voyager Space Exploration Systems (Formerly Nanoracks), is this right? Maybe NRCSD29?

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@fredy - This is indeed for NRCSD29. SilverSat’s deployment is at 08:20 UTC. I can check with our deployer-mates and see if they’re OK with me sharing their information.

We will need to command the SilverSat beacon on, and our first opportunity to do this will be ~14:50 UTC. One thing to note: our antenna is a turnstile perpendicular to the magnetically-stabilized axis. We will be predominately LHCP for northern-hemisphere stations and predominately RHCP for southern-hemisphere stations.

- Dave

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any pic of your sat?

Live stream of the deployment: https://www.youtube.com/watch?v=lIFdCA7Ow3w

Satellites that will be deployed:
Deployment 1 - DUPLEX (6U): 3:10am ET (8:10 GMT)
Deployment 2 - SilverSat (1U), RHOK-SAT (1U), ContentCube (1U), Alpha (1U): 3:20am ET (8:20 GMT)
Deployment 3 - EagleSat-2 (3U), Foras Promineo (3U): 4:50am ET (9:50 GMT)

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Deployment Satellite Freq + Mod Notes
1 (08:10 UTC) DUPLEX (6U) no IARU
2 (08:20 UTC) SilverSat (1U) 437.175, 9k6 SSDV + CW IARU
RHOK-SAT (1U) 435.425, 9k6 FSK IARU
ContentCube (1U) 437.020, 9k6 FSK IARU
CU-Alpha (1U) 437.400 LoRa IARU
3 (09:50 UTC) EagleSat-2 (3U) 437.165, 19k2 FSK IARU
Foras Promineo (3U) 437.400, LoRa IARU
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Preliminary TLE

Foras Promineo
1 98465U          25335.38269144  .00009617  00000-0  18108-3 0  9991
2 98465  51.6310 198.7026 0003646 190.2550 169.8364 15.49224672541092
ContentCube
1 98468U          25335.38269144  .00009617  00000-0  18108-3 0  9994
2 98468  51.6310 198.7026 0003646 190.2550 169.8364 15.49224672541095
SilverSat
1 98538U          25335.38269144  .00009617  00000-0  18108-3 0  9992
2 98538  51.6310 198.7026 0003646 190.2550 169.8364 15.49224672541093
EagleSat-2
1 98912U          25335.38269144  .00009617  00000-0  18108-3 0  9998
2 98912  51.6310 198.7026 0003646 190.2550 169.8364 15.49224672541099
RHOK-SAT
1 99932U          25335.38269144  .00009617  00000-0  18108-3 0  9991
2 99932  51.6310 198.7026 0003646 190.2550 169.8364 15.49224672541092
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In total 748 observations have been scheduled for the first ~24h after deployment of the satellites. We have used the TLE sets of the previous post.

Difference in the number of scheduled observations may be based on:

  • Transmission frequency of the satellite
  • Orbit of the satellite/TLE set
  • Request by or communication with the satellite team
  • Spectrum misuse or violation of regulations
Temp NORAD ID Satellite Scheduled Observations
98465 Foras Promineo 150
98912 EagleSat-2 149
98468 ContentCube 149
98538 SilverSat 151
99932 RHOK-SAT 149
Total 748

NOTE: Given that the TLE is from ISS, if scheduling, please make sure that you leave some slots for ISS scheduling.

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The TLE used is the one of ISS at the deployment time:

RHOK-SAT
1 99932U 98067A   25335.89873625  .00009722  00000-0  18290-3 0  9991
2 99932  51.6307 196.1486 0003628 192.4733 167.6166 15.49234272541179
ContentCube
1 98468U 98067A   25335.89873625  .00009722  00000-0  18290-3 0  9994
2 98468  51.6307 196.1486 0003628 192.4733 167.6166 15.49234272541172
EagleSat-2
1 98912U 98067A   25335.89873625  .00009722  00000-0  18290-3 0  9998
2 98912  51.6307 196.1486 0003628 192.4733 167.6166 15.49234272541176
Foras Promineo
1 98465U 98067A   25335.89873625  .00009722  00000-0  18290-3 0  9991
2 98465  51.6307 196.1486 0003628 192.4733 167.6166 15.49234272541179
SilverSat
1 98538U 98067A   25335.89873625  .00009722  00000-0  18290-3 0  9992
2 98538  51.6307 196.1486 0003628 192.4733 167.6166 15.49234272541170
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I had an overhead pass (Europe) at 11:50 UTC, no signals received from any of the satellites released from ISS.

Jan | PE0SAT

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The same :frowning:

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SILVERSAT CW ACTIVE:
“wp2xgw shnt”

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We made first contact with SilverSat at ~14:46 UTC. The beacon should now be on, transmitting every three minutes. The beacon is 16 wpm CW: ‘WP2XGW’ followed by 4 characters of status.

We had limited success on this pass, but it was a very low elevation pass. The satellite responded to No Op commands and to setting the beacon, but other commands got dropped. We will have a better shot on the next pass.

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Always a challenge with satellites this close to one another.

This is not EagleSat-1 but SilverSat, sorry for the initial confusion.

SilverSat TLE. (Update 02-12-2025T16:45)

I need more passes for more accurate measurement, but this is a start.

SilverSat
1 98538U 98067A   25336.62648942  .00000000  00000-0  18290-3 0    09
2 98538  51.6307 229.6138 0003628 192.4733 246.9386 15.49234272    03
# 20251202.62-20251202.63, 4 measurements, 0.006 kHz rms

Jan | PE0SAT

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SilverSat

15:04 UTC WP2XGW SHNT

15:07 UTC WP2XGW SHNS

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16:42 UTC SilverSat CW beacon: WP2XGW SHNU

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Alpha is listed as coordinated as CU-Alpha, LORA on 437.400.

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Thanks @ko4ma

CU-ALPHA iaru coordination page.

For now the following TLE can be used and the satellites will be added to https://db.satnogs.org/ so it can also be used to create observations in the network.

Decodes won’t be possible because it is using LoRA.

If other modes are used or more satellites specific decoding software is available please share it.

CU-ALPHA
1 98462U 98067A   25336.62648942  .00000000  00000-0  18290-3 0    05
2 98462  51.6307 229.6138 0003628 192.4733 246.9386 15.49234272    09

Jan | PE0SAT

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By chance does anyone have additional information, or contact with the Foras Promineo Team? I emailed the contact on their IARU Coordination page but have not gotten any reply.

Until we get word that CU-Alpha goes active with its LoRa downlink, I have been monitoring 437.400 for any sign of the 125k LoRa downlink from Foras Promineo, but nothing so far.

If the Spreading Factor parameter listed on the SatNogs page (SF6) is correct, I fear that it’s going to be extremely difficult to get a clean decode from this satellite.

SF6 produces a packet that resembles a camera flash going off - nearly instantaneous. If fact, it’s such an extreme transmission that I have thus far failed to get clean decodes IN-HOUSE between LoRa-capable devices! As a sanity check, I changed both devices to SF10 and the payload decodes perfectly.

So, just wanted to ask in case anyone knew anything about this satellite or if the Team is monitoring this thread, we sure would love to hear from you.

Thanks!

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Dito.

SilverSat

2025-12-03 12:33:42z wp2x.. shns
2025-12-03 12:36:46z wp2xgw shne
2025-12-03 12:39:49z wp2xgw shnt

Best shot:

Dave (@davecopela), could you let us know how to interpret the 4 characters?
How was the discussion with your team about QSL cards?

Daniel

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