Path Calculator
Analyze microwave propagation between two points
Link Summary · 47 GHz
Distance
50 mi (81 km)
Bearing
25.8°
Terrain
BLOCKED
Propagation
55/100
MARGINAL
HRRR Data
9 / 9 points
Loss Budget · 47 GHz
FSPL (free-space)
164.0
dB
Gaseous (O₂+H₂O)
6.9
dB
Diffraction loss
96.9
dB
TOTAL PATH LOSS
267.8
dB
Gas rate: 0.0859 dB/km
H₂O: 0.0030 dB/km/g ·
O₂: 0.0400 dB/km
Abs humidity avg: 15.3 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)
-267.8
dB
RX Ant Gain
30.0
dBi
RX Power
-189.8
dBm
Sensitivity (CW)
-141.0
dBm
MARGIN
-49.8
dB
Path Weather Avg
Temperature
70.9°F
21.6°C
Dewpoint
64.6°F
18.1°C
T/Td Gap
6.3°F
Abs Humidity
15.3 g/m³
Pressure
989.3 mb
PWAT
39.0 mm
BL Depth
470.9 m
Refrac Gradient
-76.4 N/km
Propagation Factors · 47 GHz
Rain
100
Pressure
82
Refractivity
62
Season
55
Sky Cover
50
Wind
50
T-Td Depression
38
PWAT
35
Humidity
29
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 | Ns | dN/dh |
|---|---|---|---|---|---|---|---|---|
| Source | 32.5, -97.0 | 24.6°C | 18.7°C | 989.3 mb | 485.8 m | 38.6 mm | 355.4 | -57.5 |
| 13% | 32.5, -96.9 | 24.6°C | 18.7°C | 989.3 mb | 485.8 m | 38.6 mm | 355.4 | -57.5 |
| 25% | 32.6, -96.9 | 21.8°C | 18.8°C | 993.3 mb | 502.6 m | 41.5 mm | 353.7 | -55.1 |
| 38% | 32.7, -96.9 | 22.4°C | 17.9°C | 997.1 mb | 505.2 m | 38.6 mm | 352.3 | -59.1 |
| Midpoint | 32.8, -96.8 | 21.9°C | 18.1°C | 1001.4 mb | 448.2 m | 39.5 mm | 350.9 | -76.4 |
| 63% | 32.9, -96.8 | 20.7°C | 17.6°C | 998.3 mb | 433.5 m | 37.3 mm | 352.1 | -73.4 |
| 75% | 33.0, -96.7 | 19.7°C | 17.5°C | 993.4 mb | 482.7 m | 37.7 mm | 353.7 | -63.8 |
| 88% | 33.0, -96.7 | 19.7°C | 18.0°C | 998.0 mb | 438.2 m | 38.7 mm | 353.2 | -71.9 |
| 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:
63
at 13:00 UTC
Worst:
47
at 02:00 UTC