Path Calculator
Analyze microwave propagation between two points
Link Summary · 47 GHz
Distance
46 mi (74 km)
Bearing
38.8°
Terrain
BLOCKED
Propagation
54/100
MARGINAL
HRRR Data
9 / 9 points
Loss Budget · 47 GHz
FSPL (free-space)
163.3
dB
Gaseous (O₂+H₂O)
6.3
dB
Diffraction loss
97.5
dB
TOTAL PATH LOSS
267.1
dB
Gas rate: 0.0852 dB/km
H₂O: 0.0030 dB/km/g ·
O₂: 0.0400 dB/km
Abs humidity avg: 15.0 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)
-267.1
dB
RX Ant Gain
30.0
dBi
RX Power
-189.1
dBm
Sensitivity (CW)
-141.0
dBm
MARGIN
-49.1
dB
Path Weather Avg
Temperature
69.4°F
20.8°C
Dewpoint
64.0°F
17.8°C
T/Td Gap
5.3°F
Abs Humidity
15.0 g/m³
Pressure
996.8 mb
PWAT
39.6 mm
BL Depth
477.0 m
Refrac Gradient
-73.4 N/km
Propagation Factors · 47 GHz
Rain
100
Pressure
70
Refractivity
55
Season
55
Sky Cover
50
Wind
50
T-Td Depression
38
PWAT
35
Humidity
31
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 | 32.7, -97.0 | 22.3°C | 17.7°C | 996.8 mb | 507.0 m | 44.6 mm | 349.4 | -53.8 |
| 13% | 32.7, -96.9 | 22.4°C | 17.9°C | 997.1 mb | 505.2 m | 38.6 mm | 352.3 | -59.1 |
| 25% | 32.8, -96.8 | 22.4°C | 17.9°C | 997.1 mb | 505.2 m | 38.6 mm | 352.3 | -59.1 |
| 38% | 32.9, -96.8 | 20.7°C | 17.6°C | 998.3 mb | 433.5 m | 37.3 mm | 352.1 | -73.4 |
| Midpoint | 32.9, -96.7 | 20.7°C | 17.6°C | 998.3 mb | 433.5 m | 37.3 mm | 352.1 | -73.4 |
| 63% | 33.0, -96.6 | 19.7°C | 18.0°C | 998.0 mb | 438.2 m | 38.7 mm | 353.2 | -71.9 |
| 75% | 33.1, -96.6 | 19.7°C | 18.0°C | 998.0 mb | 438.2 m | 38.7 mm | 353.2 | -71.9 |
| 88% | 33.1, -96.5 | 18.9°C | 17.8°C | 998.4 mb | 431.7 m | 40.8 mm | 354.3 | -65.0 |
| Destination | 33.2, -96.5 | 20.1°C | 17.9°C | 997.2 mb | 600.2 m | 41.5 mm | 353.7 | -58.9 |
Midpoint vertical profile
17-Hour Propagation Forecast · 47 GHz
→ Steady
Best:
60
at 13:00 UTC
Worst:
45
at 02:00 UTC