🛰️ Massive SSTV Event Incoming (Apr 10–14) — ISS + 3 Satellites Active
We’re about to see one of the most active SSTV windows in recent months — featuring ISS (ARISS) + 3 Space-Pi satellites transmitting simultaneously.
If you're into SSTV, this is a great opportunity whether you're a beginner or experienced.
📊 Quick Overview
| Satellite | Time (UTC) | Frequency | Mode | Notes |
|---|---|---|---|---|
| ARISS (ISS SSTV) | Apr 10 12:00 – Apr 14 13:55 | 437.550 MHz | Robot36 | Series 31 |
| MONITOR-3 (RS58S) | Apr 10 00:00 – Apr 13 19:00 | 435.290 MHz | Robot36 | Cosmonautics Day |
| SAKHACUBE-CHOLBON (RS18S) | Apr 10–14 (phased) | 437.350 MHz | Robot36 | Multi-stage |
| UMKA-1 (RS40S) | From Apr 10 17:17 | 437.625 MHz | Robot36 | Image set expansion |
🛰️ Details
🛰️ ISS SSTV (ARISS) — Confirmed
- Time: Apr 10 12:00 → Apr 14 13:55 UTC
- Frequency: 437.550 MHz
- Mode: Robot36
Why it matters:
-
~10W transmit power → strong signal
-
Easiest to receive
-
Official ARISS SSTV certificate event
🛰️ MONITOR-3 (RS58S)
- Time: Apr 10 00:00 → Apr 13 19:00 UTC
- Frequency: 435.290 MHz
- Interval: ~120 seconds
📌 Cosmonautics Day themed transmissions
🛰️ SAKHACUBE-CHOLBON (RS18S)
- Frequency: 437.350 MHz
- Interval: ~180 seconds
Phased schedule (UTC):
- Apr 10 → Apr 11: Active
- Apr 11 → Apr 12: Pause
- Apr 12: Full-day transmission (peak window) ⭐
- Apr 13: Partial pause
- Apr 13 → Apr 14: Active again
📌 Multi-phase operation + QSL available
🛰️ UMKA-1 (RS40S)
- Start: Apr 10 17:17 UTC
- Frequency: 437.625 MHz
📌 Features:
-
Starts with 9 images
-
Expands to 12 images on Apr 12
-
Requires multiple passes to collect full set
🎯 What Should You Prioritize?
🥇 Best chance (don’t miss):
- ISS (ARISS SSTV)
🥈 Stable & consistent:
- MONITOR-3
🥉 Collector challenge:
- UMKA-1 (image set)
🎯 Advanced / timing challenge:
-
RS18S (phased schedule)
📡 Receiving Tips
All satellites share similar characteristics:
- UHF band SSTV
- Robot36 mode
- Can be received with a handheld radio + smartphone
Basic workflow:
You don’t need a complex setup — even balcony or portable setups work.
🔥 Key Windows to Watch
-
Apr 10 evening (UTC): ISS + RS18S overlapping
-
Apr 12: Peak activity across multiple satellites
✨ Final Thoughts
👉 Apr 10–14 is a rare multi-satellite SSTV event
👉 Great for both first-time decoders and experienced operators
If you’re planning to receive, now’s the time to prepare your setup.
If anyone’s actively decoding during this window, feel free to share results here 📡👇
Posted Apr 10, 2026, 12:43 AM UTC