Radio & Satellite

Free, privacy-friendly tools for ham radio operators, SDR listeners and satellite chasers. Everything below is live.

ISS right now
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Satellites on the globe
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Kp index
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Solar flux
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Sun overhead
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Drag to spin the globe. Red = ISS with its orbit, yellow = amateur radio satellites, white = bright satellites.

All radio & satellite tools

Satellite Tracker & Pass Predictor When the ISS, METEOR weather satellites or amateur radio satellites pass over you, with frequencies, Doppler and a live map.
SDR Frequency Guide Signals worth receiving with an RTL-SDR or scanner: ADS-B, AIS, ACARS, satellites, weather radio, APRS, ISM sensors, Meshtastic and more.
Antenna Calculator Element lengths for dipoles, ground planes, 5/8 verticals, V-dipoles for weather satellites, ADS-B collinears and Yagis, with diagrams.
RF Calculators Wavelength, dBm ↔ watts, path loss, link budget, coax loss, SWR, radio horizon, Fresnel zone and EIRP, worked out as you type.
HF Propagation & Space Weather Live Kp index, solar flux and HF band conditions from 80 m to 10 m, explained in plain English.
Maidenhead Grid Locator Coordinates to grid square and back, your own grid, and the distance and beam heading between two locations.
Gray Line & Aurora Map Live world map of day, night and twilight with the NOAA aurora forecast and your sunrise and sunset, for planning HF DX.
Great-Circle Map Azimuthal equidistant map centred on your location: true beam headings and distances to anywhere, with PNG download.
WSPR Map: Who Heard Me? Every station that heard your WSPR signal (or that you heard), on a live map with SNR colours and band filters.
US Amateur Band Plan Interactive chart of Technician, General, Advanced and Extra privileges on every band from 160 m to 70 cm, with CW/data and phone segments.
Callsign Lookup Look up US amateur radio callsigns and FCC land-mobile licences with their frequencies.
NyxScope decoding Iridium satellite bursts on L-band, with a live map
Iridium satellite decoding with live map in NyxScope

Listen and decode with NyxScope

Turn a $30 RTL-SDR into a full monitoring station: aircraft, ships, satellites, pagers, weather sensors and trunked radio. NyxScope is a free multi-protocol SDR scanner for Windows from ICBizLabs, the team behind kilaz.com, with a 30-day trial of its licensed features.

Get NyxScope (free)

Live aircraft near you: adsb.kilaz.net. Orbital data: CelesTrak. Space weather: NOAA SWPC. Map data: Natural Earth.

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