Path Calculator

Analyze microwave propagation between two points

Source

Destination ( or grid)

Band

TX Power (dBm)

TX Height (ft)

TX Gain (dBi)

RX Height (ft)

RX Gain (dBi)

Link Summary · 47 GHz

Distance

146 mi (236 km)

Bearing

37.9°

Terrain

BLOCKED

Propagation

57/100

MARGINAL

HRRR Data

9 / 9 points

Loss Budget · 47 GHz

FSPL (free-space) 173.3 dB

Gaseous (O₂+H₂O) 20.6 dB

Diffraction loss 143.4 dB

TOTAL PATH LOSS 337.4 dB

Gas rate: 0.0874 dB/km

H₂O: 0.0030 dB/km/g · O₂: 0.0400 dB/km

Abs humidity avg: 15.8 g/m³

Power Budget

TX Power 20.0 dBm (100.0 mW)

TX Ant Gain 30.0 dBi

Feed Loss (×2) -2.0 dB

EIRP 48.0 dBm

Path Loss (w/FF) -337.4 dB

RX Ant Gain 30.0 dBi

RX Power -259.4 dBm

Sensitivity (CW) -141.0 dBm

MARGIN -119.4 dB

Path Weather Avg

Temperature

77.6°F

25.3°C

Dewpoint

65.9°F

18.8°C

T/Td Gap

11.7°F

Abs Humidity

15.8 g/m³

Pressure

969.5 mb

PWAT

39.2 mm

BL Depth

855.4 m

Refrac Gradient

-73.4 N/km

Propagation Factors · 47 GHz

Rain 100

Pressure 88

T-Td Depression 60

Refractivity 55

Season 55

Sky Cover 50

Wind 50

PWAT 35

Humidity 25

Time of Day 18

Atmospheric Profile

HRRR (3 km) Valid 2026-05-10 21:00 UTC 9 path samples

Point	Lat, Lon	Temp	Dewpt	Press	HPBL	PWAT	N_s	dN/dh
Source	31.5, -98.2	29.5°C	20.9°C	969.5 mb	1526.8 m	36.1 mm	359.1	-72.4
13%	31.7, -98.0	29.6°C	19.9°C	973.2 mb	1469.0 m	36.7 mm	352.4	-65.2
25%	31.9, -97.8	29.4°C	19.3°C	978.2 mb	1571.7 m	40.1 mm	350.4	-55.7
38%	32.1, -97.6	25.8°C	19.3°C	985.8 mb	570.8 m	43.1 mm	356.9	-50.4
Midpoint	32.3, -97.4	25.8°C	19.0°C	988.3 mb	551.0 m	39.7 mm	357.0	-51.0
63%	32.5, -97.2	24.1°C	17.9°C	987.9 mb	463.3 m	37.8 mm	352.5	-48.9
75%	32.7, -97.0	23.7°C	17.9°C	999.8 mb	656.0 m	41.6 mm	350.5	-52.6
88%	32.9, -96.8	20.7°C	17.6°C	998.3 mb	433.5 m	37.3 mm	352.1	-73.4
Destination	33.1, -96.6	19.4°C	17.8°C	995.0 mb	456.2 m	40.3 mm	354.2	-62.2

Midpoint vertical profile

17-Hour Propagation Forecast · 47 GHz

→ Steady

Best: 62 at 13:00 UTC Worst: 52 at 02:00 UTC