Distance
213.8
km · 132.8 mi
Bearing
50.9°
true · rev 230.9°
Terrain
BLOCKED
130.3 dB diffraction
Propagation
72/100
GOOD
Margin
-85.9
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 ≈ 448 m AGL at the midpoint (1345 m above the chord, 672 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 25.8 m) clears with margin. The geometric line of sight is obstructed — buried 613 m below terrain at its worst point.
Great circle
31.988, -98.234 → 33.189, -96.452 · 50.9°
Loss budget · 24 GHz
FSPL (free-space)
166.6
dB
Gaseous (O₂ + H₂O)
6.9
dB
Diffraction
130.3
dB
Rain attenuation
0.0
dB
Total path loss
303.9
dB
Gas rate 0.0324 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 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
-303.9
dB
RX antenna gain
30.0
dBi
RX power
-225.9
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-85.9
dB
Path weather · HRRR average of 9 samples
Temperature
80.8 °F
27.1 °C
Dewpoint
40.5 °F
4.7 °C
T/Td gap
40.3 °F
22.4 °C
Abs. humidity
6.2
g/m³
Pressure
969.3
mb
PWAT
13.2
mm
BL depth
2271.8
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
72/100
Rain
100
14%
Humidity
68
13%
PWAT
80
11%
Season
47
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
32.0, -98.2
24.8 °C
5.2 °C
969.3 mb
1964.9
12.2 mm
—
13%
32.1, -98.0
25.8 °C
5.3 °C
975.2 mb
2100.9
12.7 mm
—
25%
32.3, -97.8
27.3 °C
4.7 °C
991.8 mb
2271.2
12.6 mm
—
38%
32.4, -97.6
26.6 °C
4.3 °C
984.0 mb
2307.9
12.6 mm
—
Midpoint
32.6, -97.3
27.8 °C
4.2 °C
988.3 mb
2426.0
13.2 mm
—
63%
32.7, -97.1
28.5 °C
2.4 °C
996.2 mb
2374.9
11.6 mm
—
75%
32.9, -96.9
28.4 °C
3.6 °C
999.3 mb
2334.7
14.1 mm
—
88%
33.0, -96.7
26.9 °C
8.9 °C
997.3 mb
2285.5
16.9 mm
—
Destination
33.2, -96.5
27.8 °C
4.1 °C
995.4 mb
2379.9
13.3 mm
—
Midpoint vertical profile
17-hour forecast · this path · 24 GHz
→ steady
Peak 76
at 21:00 UTC
· low 63
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 76 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 74 | GOOD |
| 00:00 | 70 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 69 | GOOD |
| 03:00 | 74 | GOOD |
| 04:00 | 71 | GOOD |
| 05:00 | 74 | GOOD |
| 06:00 | 70 | GOOD |
| 07:00 | 74 | GOOD |
| 08:00 | 73 | GOOD |
| 09:00 | 73 | GOOD |
| 10:00 | 73 | GOOD |
| 11:00 | 66 | GOOD |
| 12:00 · now | 63 | MARGINAL |