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MONITOR-4 (RS57S) (NORAD 57182)

MONITOR-4 (RS57S) is an amateur radio satellite (NORAD 57182) in a LEO orbit 468 by 482 km above the Earth, circling the planet every 94.1 minutes. Right now it is over latitude -59.2°, longitude 22.4° at an altitude of 493 km.

Live position and ground track (past 45 min, next 100 min)

Where is MONITOR-4 (RS57S) now?

Latitude: -59.159°
Longitude: 22.436°
Altitude: 493.2 km
Speed: 7.619 km/s
Footprint radius: 2431 km

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Frequencies and modes

Link	Uplink	Downlink	Mode
Mode U - GMSK 4k8 (USP FEC) TLM	—	436.08 MHz	GMSK USP
Mode U - GMSK 2k4 (USP FEC) TLM	—	436.08 MHz	GMSK USP
Mode U - GMSK 9k6 (USP FEC)	—	436.08 MHz	GMSK USP

Frequencies are the nominal values from the SatNOGS database and can change. While the satellite is above your horizon the table shows the Doppler-corrected frequencies. For how to use them, read working amateur radio satellites.

Orbit and identity

57182NORAD catalog number

2023-091SInternational designator

Amateur radioCategory

LEOOrbit class

94.1 minOrbital period

468 × 482 kmPerigee × apogee altitude

97.49°Inclination

0.001026Eccentricity

15.3028Revolutions per day

2023Launch year

In orbitStatus (SatNOGS)

NoneOperator

Orbital elements epoch: 2026-10-30T10:34:13 UTC (11 hours ago). Positions drift from reality as the elements age; fresh elements are fetched automatically.

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Positions are computed from public orbital elements (CelesTrak / US Space Force 18th SDS) with the SGP4 model and are accurate to a few kilometres; amateur radio data from the SatNOGS DB (CC BY-SA). Not for navigation or safety-critical use. Method and limits · Radio coverage map · Live HF propagation data