Distance
44.5
km · 27.7 mi
Bearing
149.1°
true · rev 329.1°
Terrain
BLOCKED
99.7 dB diffraction
Propagation
72/100
GOOD
Margin
-43.2
dB over CW threshold
Terrain profile · SRTM 30 m + canopy + MS footprints
Line of sight
1st Fresnel
Duct layer
Horizon ray
Common volume
Over the horizon: the two horizon-skimming rays intersect at the common volume ≈ 19 m AGL at the midpoint (58 m above the chord, 29 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 8.4 m) clears with margin. The geometric line of sight is obstructed — buried 63 m below terrain at its worst point.
Great circle
33.464, -96.861 → 33.12, -96.615 · 149.1°
Loss budget · 47 GHz
FSPL (free-space)
158.9
dB
Gaseous (O₂ + H₂O)
2.6
dB
Diffraction
99.7
dB
Rain attenuation
0.0
dB
Total path loss
261.2
dB
Gas rate 0.0586 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 6.2 g/m³
Power budget
TX power
20.0
dBm
(100.0 mW)
TX antenna gain
30.0
dBi
Feed loss (×2)
-2.0
dB
EIRP
48.0
dBm
Path loss
-261.2
dB
RX antenna gain
30.0
dBi
RX power
-183.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-43.2
dB
Path weather · HRRR average of 9 samples
Temperature
81.8 °F
27.6 °C
Dewpoint
40.7 °F
4.8 °C
T/Td gap
41.1 °F
22.8 °C
Abs. humidity
6.2
g/m³
Pressure
990.1
mb
PWAT
13.3
mm
BL depth
2295.0
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
72/100
Rain
100
14%
Humidity
94
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
70
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-03 20:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
33.5, -96.9
27.3 °C
5.4 °C
992.6 mb
2120.7
11.8 mm
—
13%
33.4, -96.8
27.6 °C
5.2 °C
993.6 mb
2274.0
12.7 mm
—
25%
33.4, -96.8
26.8 °C
5.1 °C
990.1 mb
2214.9
12.3 mm
—
38%
33.3, -96.8
26.8 °C
5.1 °C
990.1 mb
2214.9
12.3 mm
—
Midpoint
33.3, -96.7
28.1 °C
4.7 °C
992.1 mb
2338.5
14.1 mm
—
63%
33.2, -96.7
28.1 °C
4.7 °C
992.1 mb
2338.5
14.1 mm
—
75%
33.2, -96.7
27.8 °C
5.4 °C
994.2 mb
2397.3
14.6 mm
—
88%
33.2, -96.6
28.2 °C
3.9 °C
994.1 mb
2377.9
13.9 mm
—
Destination
33.1, -96.6
28.2 °C
3.9 °C
994.1 mb
2377.9
13.9 mm
—
Midpoint vertical profile
17-hour forecast · this path · 47 GHz
→ steady
Peak 81
at 06:00 UTC
· low 66
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 79 | GOOD |
| 21:00 | 79 | GOOD |
| 22:00 | 79 | GOOD |
| 23:00 | 79 | GOOD |
| 00:00 | 79 | GOOD |
| 01:00 | 80 | EXCELLENT |
| 02:00 | 78 | GOOD |
| 03:00 | 79 | GOOD |
| 04:00 | 77 | GOOD |
| 05:00 | 80 | EXCELLENT |
| 06:00 | 81 | EXCELLENT |
| 07:00 | 80 | EXCELLENT |
| 08:00 | 79 | GOOD |
| 09:00 | 80 | EXCELLENT |
| 10:00 | 79 | GOOD |
| 11:00 | 77 | GOOD |
| 12:00 · now | 66 | GOOD |