Distance
158.4
km · 98.4 mi
Bearing
63.3°
true · rev 243.3°
Terrain
BLOCKED
126.7 dB diffraction
Propagation
73/100
GOOD
Margin
-88.2
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 ≈ 246 m AGL at the midpoint (738 m above the chord, 369 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 15.9 m) clears with margin. The geometric line of sight is obstructed — buried 317 m below terrain at its worst point.
Great circle
32.488, -98.135 → 33.12, -96.615 · 63.3°
Loss budget · 47 GHz
FSPL (free-space)
169.9
dB
Gaseous (O₂ + H₂O)
9.7
dB
Diffraction
126.7
dB
Rain attenuation
0.0
dB
Total path loss
306.2
dB
Gas rate 0.0612 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.0 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
-306.2
dB
RX antenna gain
30.0
dBi
RX power
-228.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-88.2
dB
Path weather · HRRR average of 9 samples
Temperature
80.9 °F
27.2 °C
Dewpoint
43.9 °F
6.6 °C
T/Td gap
37.1 °F
20.6 °C
Abs. humidity
7.0
g/m³
Pressure
979.9
mb
PWAT
15.4
mm
BL depth
2366.6
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
88
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
88
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
32.5, -98.1
26.8 °C
6.6 °C
979.9 mb
2251.0
14.5 mm
—
13%
32.6, -97.9
27.4 °C
6.3 °C
987.6 mb
2292.4
14.2 mm
—
25%
32.6, -97.8
27.2 °C
5.5 °C
983.0 mb
2326.3
14.1 mm
—
38%
32.7, -97.6
25.2 °C
6.5 °C
980.6 mb
2310.6
13.7 mm
—
Midpoint
32.8, -97.4
26.6 °C
7.7 °C
996.2 mb
2363.9
13.2 mm
—
63%
32.9, -97.2
27.4 °C
6.7 °C
995.6 mb
2347.8
15.1 mm
—
75%
33.0, -97.0
28.4 °C
7.7 °C
998.3 mb
2507.4
19.1 mm
—
88%
33.0, -96.8
27.2 °C
6.3 °C
993.3 mb
2401.0
17.5 mm
—
Destination
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
Midpoint vertical profile
18-hour forecast · this path · 47 GHz
→ steady
Peak 79
at 21:00 UTC
· low 62
at 11:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 78 | GOOD |
| 21:00 | 79 | GOOD |
| 22:00 | 78 | GOOD |
| 23:00 | 79 | GOOD |
| 00:00 | 78 | GOOD |
| 01:00 | 75 | GOOD |
| 02:00 | 67 | GOOD |
| 03:00 | 74 | GOOD |
| 04:00 | 75 | GOOD |
| 05:00 | 75 | GOOD |
| 06:00 | 75 | GOOD |
| 07:00 | 73 | GOOD |
| 08:00 | 73 | GOOD |
| 09:00 | 73 | GOOD |
| 10:00 | 71 | GOOD |
| 11:00 | 62 | MARGINAL |
| 12:00 | 68 | GOOD |
| 13:00 · now | 67 | GOOD |