Distance
260.2
km · 161.7 mi
Bearing
82.8°
true · rev 262.8°
Terrain
BLOCKED
141.5 dB diffraction
Propagation
53/100
MARGINAL
Margin
-104.7
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 ≈ 664 m AGL at the midpoint (1992 m above the chord, 996 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 28.5 m) clears with margin. The geometric line of sight is obstructed — buried 1051 m below terrain at its worst point.
Great circle
32.926, -99.226 → 33.189, -96.452 · 82.8°
Loss budget · 24 GHz
FSPL (free-space)
168.3
dB
Gaseous (O₂ + H₂O)
12.8
dB
Diffraction
141.5
dB
Rain attenuation
0.0
dB
Total path loss
322.7
dB
Gas rate 0.0492 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 14.6 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
-322.7
dB
RX antenna gain
30.0
dBi
RX power
-244.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-104.7
dB
Path weather · HRRR average of 9 samples
Temperature
67.0 °F
19.5 °C
Dewpoint
63.1 °F
17.3 °C
T/Td gap
3.9 °F
2.2 °C
Abs. humidity
14.6
g/m³
Pressure
970.6
mb
PWAT
38.7
mm
BL depth
527.4
m AGL
Refrac. gradient
-73.9
N/km
Propagation factors · 24 GHz
53/100
Rain
100
14%
Humidity
0
13%
PWAT
35
11%
Season
47
11%
T-Td Depression
18
10%
Refractivity
55
10%
Pressure
88
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-10 22:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.9, -99.2
19.1 °C
16.9 °C
970.6 mb
-54.7
763.4
39.0 mm
—
13%
33.0, -98.9
18.8 °C
16.6 °C
972.8 mb
-63.0
523.0
37.8 mm
—
25%
33.0, -98.5
20.1 °C
17.0 °C
978.6 mb
-70.6
539.6
38.2 mm
—
38%
33.0, -98.2
19.7 °C
17.3 °C
979.6 mb
-71.3
487.6
38.2 mm
—
Midpoint
33.1, -97.8
19.6 °C
17.1 °C
973.4 mb
-73.9
454.5
33.7 mm
—
63%
33.1, -97.5
20.0 °C
17.8 °C
983.9 mb
-57.2
529.6
40.3 mm
—
75%
33.1, -97.1
19.7 °C
17.5 °C
996.1 mb
-61.4
481.8
40.8 mm
—
88%
33.2, -96.8
19.0 °C
17.7 °C
992.4 mb
-61.5
471.6
40.4 mm
—
Destination
33.2, -96.5
19.1 °C
17.4 °C
996.3 mb
-67.2
495.6
40.4 mm
—
Midpoint vertical profile
17-hour forecast · this path · 24 GHz
→ steady
Peak 73
at 13:00 UTC
· low 42
at 01:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 22:00 | 51 | MARGINAL |
| 23:00 | 51 | MARGINAL |
| 00:00 | 54 | MARGINAL |
| 01:00 | 42 | POOR |
| 02:00 | 54 | MARGINAL |
| 03:00 | 58 | MARGINAL |
| 04:00 | 56 | MARGINAL |
| 05:00 | 57 | MARGINAL |
| 06:00 | 59 | MARGINAL |
| 07:00 | 60 | MARGINAL |
| 08:00 | 60 | MARGINAL |
| 09:00 | 61 | MARGINAL |
| 10:00 | 62 | MARGINAL |
| 11:00 | 62 | MARGINAL |
| 12:00 | 68 | GOOD |
| 13:00 | 73 | GOOD |
| 14:00 · now | 72 | GOOD |