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0 NOW
0 SEEN
0 MAX NM
- HIGH FL
- FAST KT
- NEAR NM
0 COUNTRIES
0 ACARS
0 VDL2
Local SOURCE
-- SIGNAL
00:00:00 SESSION
History
STANDBY
--:--:-- UTC
ACARS MESSAGES
0
⚠ Requires separate SDR (VHF ~131 MHz)
No ACARS messages
Start ACARS to receive aircraft datalink messages
VDL2 MESSAGES
0
⚠ Requires separate SDR (VHF ~137 MHz)
No VDL2 messages
Start VDL2 to receive digital datalink messages
SELECTED TARGET
✈
Select an aircraft
TRACKED AIRCRAFT
No aircraft detected
Start tracking to begin
DISPLAY
LOCATION
ADS-B TRACKING
AIRBAND
SQ VOL
OFF
SQUAWK CODE REFERENCE
Code Name Description
★ WATCHLIST
No entries. Add callsigns, registrations, or ICAO codes to watch.
0 entries Alerts trigger when watched aircraft appear
ANTENNA GUIDE — 1090 MHz ADS-B

1090 MHz — stock SDR antenna can work but is not ideal

Stock Telescopic Antenna
  • 1090 MHz: Collapse to ~6.9 cm (quarter-wave). It works for nearby aircraft
  • Range: Expect ~50 NM (90 km) indoors, ~100 NM outdoors
Recommended: 1090 MHz Collinear (~$10-20 DIY)
  • Design: 8 coaxial collinear elements from RG-6 coax cable
  • Element length: ~6.9 cm segments soldered alternating center/shield
  • Gain: ~5–7 dBi omnidirectional, ideal for 360° coverage
  • Range: 150–250+ NM depending on height and LOS
Commercial Options
  • FlightAware antenna: ~$35, 1090 MHz tuned, 66cm fiberglass whip
  • ADSBexchange whip: ~$40, similar performance
  • Jetvision A3: ~$50, high-gain 1090 MHz collinear
Placement & LNA
  • Location: OUTDOORS, as high as possible. Roof or mast mount
  • Height: Every 3m higher adds ~10 NM range (line-of-sight)
  • LNA: 1090 MHz filtered LNA at antenna feed (e.g. Uputronics, ~$30)
  • Filter: A 1090 MHz bandpass filter removes cell/FM interference
  • Coax: Keep short. At 1090 MHz, RG-58 loses ~10 dB per 10m
  • Bias-T: Enable Bias-T in controls above if LNA is powered via coax
Quick Reference
ADS-B frequency1090 MHz
Quarter-wave length6.9 cm
ModulationPPM (pulse)
PolarizationVertical
Bandwidth~2 MHz
Typical range (outdoor)100–250 NM
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