QO-100
ES'HAIL 2 · amateur radio satellite, NORAD 43700
Heard todayQO-100 frequencies
| Uplink | Downlink | Beacon | Mode |
|---|---|---|---|
| 2400.005-2400.040 MHz | 10489.505-10489.540 MHz | — | CW linear |
| 2400.040-2400.080 MHz | 10489.540-10489.580 MHz | — | FM linear |
| 2400.080-2400.150 MHz | 10489.580-10489.650 MHz | — | FM linear |
| 2400.150-2400.245 MHz | 10489.650-10489.745 MHz | — | FM linear |
| 2400.255-2400.350 MHz | 10489.755-10489.850 MHz | — | FM linear |
| 2400.350-2400.495 MHz | 10489.850-10489.995 MHz | — | FM linear |
| 2400.360 MHz | 10489.860 MHz | — | USB |
| — | 10489.635 MHz | — | OFDM |
| — | — | 10489.503 MHz | CW 11 bd |
| — | — | 10489.795-10489.800 MHz | BPSK 400 bd linear |
| — | — | 10489.745-10489.755 MHz | BPSK 400 bd linear |
| — | — | 10489.995-10490.000 MHz | CW linear |
| — | — | 10489.995-10490.000 MHz | FM linear |
Nominal frequencies, without Doppler. The live map shifts them for your station during a pass. Frequencies: SatNOGS DB (modified: working amateur transmitters only, in MHz), CC BY-SA 4.0.
About QO-100
QO-100 (Qatar-OSCAR 100) is the amateur radio payload of Es'hail-2, a geostationary communications satellite of the Qatar Satellite Company Es'hailSat, built by Mitsubishi Electric on its DS-2000 platform and launched on 15 November 2018 on a Falcon 9 rocket from Florida. The two amateur transponders were provided by Es'hailSat and the Qatar Amateur Radio Society in cooperation with AMSAT-DL. It is the first amateur radio transponder in geostationary orbit.
Because the satellite sits at 25.9° East, it does not move in the sky: there are no passes and no Doppler tracking, and stations in its footprint, from Brazil to Thailand, can use it around the clock. The narrowband transponder takes uplinks at 2400.000–2400.500 MHz and transmits on 10489.500–10490.000 MHz. Unlike most amateur linear transponders it is not inverting: USB up gives USB down. A second, wideband transponder (2401.5–2409.5 MHz up, 10491–10499 MHz down) is used for digital amateur television.
To receive it you need a small dish and a 10 GHz LNB; to transmit, a 2.4 GHz uplink station. AMSAT-DL's operating guidelines ask that no signal be stronger in the downlink than the transponder beacons, that nothing be sent below the lower or above the upper beacon, and that no FM be used; stations that are too strong are marked by an automatic "LEILA" siren and should reduce power at once.
Status
Active: amateurs reported hearing QO-100 on AMSAT 2 h ago.
From reports filed on AMSAT, last 30 days.
Orbit
| Type | Geostationary |
|---|---|
| Altitude | 35781–35791 km |
| Inclination | 0.0° |
| Period | 1436.1 min |
| TLE epoch | 2026-10-09 05:48 UTC |
Orbital elements: CelesTrak, checked every 3 hours.
Questions about QO-100
- What is the QO-100 uplink frequency?
- QO-100 listens on 2400.005-2400.040 MHz (CW linear), 2400.040-2400.080 MHz (FM linear), 2400.080-2400.150 MHz (FM linear), 2400.150-2400.245 MHz (FM linear), 2400.255-2400.350 MHz (FM linear), 2400.350-2400.495 MHz (FM linear) and 2400.360 MHz (USB).
- What is the QO-100 downlink frequency?
- QO-100 transmits on 10489.505-10489.540 MHz (CW linear), 10489.540-10489.580 MHz (FM linear), 10489.580-10489.650 MHz (FM linear), 10489.650-10489.745 MHz (FM linear), 10489.755-10489.850 MHz (FM linear), 10489.850-10489.995 MHz (FM linear), 10489.860 MHz (USB) and 10489.635 MHz (OFDM).
- What is the QO-100 beacon frequency?
- The beacon is on 10489.503 MHz, 10489.795-10489.800 MHz, 10489.745-10489.755 MHz, 10489.995-10490.000 MHz and 10489.995-10490.000 MHz.
- Is QO-100 active?
- Active: amateurs reported hearing QO-100 on AMSAT 2 h ago.
- When does QO-100 pass over my location?
- Open QO-100 on the live map and enter your Maidenhead locator or use GPS: the tracker lists the passes of the next 24 hours with AOS, maximum elevation and LOS, and shifts the frequencies for Doppler.