Distance
262.8
km · 163.3 mi
Bearing
79.1°
true · rev 259.1°
Terrain
BLOCKED
140.5 dB diffraction
Propagation
71/100
GOOD
Margin
-99.8
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 ≈ 677 m AGL at the midpoint (2032 m above the chord, 1016 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 28.7 m) clears with margin. The geometric line of sight is obstructed — buried 1016 m below terrain at its worst point.
Great circle
32.705, -99.387 → 33.12, -96.615 · 79.1°
Loss budget · 24 GHz
FSPL (free-space)
168.4
dB
Gaseous (O₂ + H₂O)
8.8
dB
Diffraction
140.5
dB
Rain attenuation
0.0
dB
Total path loss
317.8
dB
Gas rate 0.0336 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 6.8 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
-317.8
dB
RX antenna gain
30.0
dBi
RX power
-239.8
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-99.8
dB
Path weather · HRRR average of 9 samples
Temperature
79.8 °F
26.6 °C
Dewpoint
42.9 °F
6.1 °C
T/Td gap
36.9 °F
20.5 °C
Abs. humidity
6.8
g/m³
Pressure
957.2
mb
PWAT
13.6
mm
BL depth
2283.8
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
71/100
Rain
100
14%
Humidity
61
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
32.7, -99.4
25.1 °C
6.2 °C
957.2 mb
1983.9
12.8 mm
—
13%
32.8, -99.0
27.1 °C
4.5 °C
974.0 mb
2228.0
12.7 mm
—
25%
32.8, -98.7
26.6 °C
4.9 °C
972.4 mb
2244.0
12.6 mm
—
38%
32.9, -98.3
27.4 °C
4.7 °C
978.1 mb
2385.8
13.4 mm
—
Midpoint
32.9, -98.0
27.3 °C
5.4 °C
980.4 mb
2353.2
14.1 mm
—
63%
33.0, -97.7
26.8 °C
5.6 °C
985.8 mb
2378.7
14.4 mm
—
75%
33.0, -97.3
25.9 °C
8.9 °C
993.3 mb
2257.3
13.6 mm
—
88%
33.1, -97.0
24.4 °C
10.4 °C
997.5 mb
2345.3
15.1 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 · 24 GHz
→ steady
Peak 76
at 21:00 UTC
· low 64
at 11:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 76 | GOOD |
| 22:00 | 71 | GOOD |
| 23:00 | 71 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 71 | GOOD |
| 03:00 | 71 | GOOD |
| 04:00 | 75 | GOOD |
| 05:00 | 73 | GOOD |
| 06:00 | 70 | GOOD |
| 07:00 | 72 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 71 | GOOD |
| 10:00 | 68 | GOOD |
| 11:00 | 64 | MARGINAL |
| 12:00 · now | 65 | GOOD |