📡
Radio Path Calculator
Longley-Rice ITM · ITU-R
🗺 Map
⚙ Parameters
📊 Results
Click on map — TX point
TX
—
RX
—
📏
Dist
—
Reset
Calculate
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Radio Link
Frequency, MHz
TX Power, dBm
TX Gain, dBi
RX Gain, dBi
TX Height, m
RX Height, m
Receiver
Sensitivity, dBm
Noise Figure, dB
Bandwidth, kHz
Bitrate, kbit/s
Propagation Environment (ITM)
Surface Type
Sea water
Fresh water
Dry / poor ground
Average ground
Wet / marshy ground
Urban / built-up
Climate
Equatorial maritime
Equatorial continental
Temperate maritime
Temperate continental
Subtropical maritime
Desert
Subtropical continental
Polarization
Horizontal
Vertical
Time %
Location %
Vegetation
Include foliage attenuation (ITU-R P.833)
Path in foliage, m
Foliage type
Dense
Medium
Sparse
Advanced
Profile points
50 (fast)
100
200
400 (precise)
Elevation source
Auto (with fallback)
Open-Meteo
OpenTopoData (SRTM)
Open-Elevation
📊
Place two points on the map and press Calculate.
Link Margin
—
dB
—
Distance
—
km
Total Loss
—
dB
RX Power
—
dBm
SNR
—
dB
Longley-Rice ITM
FSPL
—
ITM excess loss
—
Time variability
—
Location variability
—
Mode
—
Path Geometry
Path type
—
Clearance H
—
1st Fresnel zone
—
Fresnel clearance %
—
TX horizon dist
—
RX horizon dist
—
Δh (terrain roughness)
—
Link Budget
EIRP
—
Noise floor
—
Eb/N0
—
Shannon capacity
—
Bit Error Rate
BPSK / QPSK
—
2-FSK coherent
—
Link reliable
—
Additional Losses
Vegetation
—
Data Source
Elevation
—
Query time
—
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