Distance
180.1
km · 111.9 mi
Bearing
93.2°
true · rev 273.2°
Terrain
BLOCKED
125.3 dB diffraction
Propagation
64/100
MARGINAL
Margin
-80.5
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 ≈ 318 m AGL at the midpoint (955 m above the chord, 477 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 23.7 m) clears with margin. The geometric line of sight is obstructed — buried 478 m below terrain at its worst point.
Great circle
33.226, -98.546 → 33.12, -96.615 · 93.2°
Loss budget · 24 GHz
FSPL (free-space)
165.2
dB
Gaseous (O₂ + H₂O)
8.1
dB
Diffraction
125.3
dB
Rain attenuation
0.0
dB
Total path loss
298.5
dB
Gas rate 0.0449 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 12.4 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
-298.5
dB
RX antenna gain
30.0
dBi
RX power
-220.5
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-80.5
dB
Path weather · HRRR average of 9 samples
Temperature
73.9 °F
23.3 °C
Dewpoint
58.9 °F
14.9 °C
T/Td gap
15.0 °F
8.3 °C
Abs. humidity
12.4
g/m³
Pressure
963.4
mb
PWAT
26.2
mm
BL depth
295.0
m AGL
Refrac. gradient
-118.6
N/km · super-refractive
Propagation factors · 24 GHz
64/100
Rain
100
14%
Humidity
6
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
80
10%
Refractivity
72
10%
Pressure
88
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
55
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-15 08:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
33.2, -98.5
23.6 °C
12.8 °C
963.4 mb
-66.3
350.6
26.4 mm
—
13%
33.2, -98.3
23.4 °C
12.9 °C
970.4 mb
-54.0
316.6
27.5 mm
—
25%
33.2, -98.1
22.8 °C
14.0 °C
973.5 mb
-70.3
259.2
29.0 mm
—
38%
33.2, -97.8
23.7 °C
15.0 °C
977.3 mb
-82.9
259.3
28.9 mm
—
Midpoint
33.2, -97.6
22.8 °C
16.8 °C
982.3 mb
-79.5
336.4
28.8 mm
—
63%
33.2, -97.3
21.9 °C
17.4 °C
981.7 mb
-118.6
255.7
26.2 mm
—
75%
33.1, -97.1
23.7 °C
14.6 °C
988.7 mb
-58.0
331.9
24.0 mm
—
88%
33.1, -96.9
23.5 °C
15.0 °C
988.3 mb
-69.0
279.1
22.7 mm
—
Destination
33.1, -96.6
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 mm
—
Midpoint vertical profile
18-hour forecast · this path · 24 GHz
→ steady
Peak 66
at 10:00 UTC
· low 50
at 00:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 60 | MARGINAL |
| 09:00 | 56 | MARGINAL |
| 10:00 | 66 | GOOD |
| 11:00 | 60 | MARGINAL |
| 12:00 | 60 | MARGINAL |
| 13:00 | 61 | MARGINAL |
| 14:00 | 60 | MARGINAL |
| 15:00 | 61 | MARGINAL |
| 16:00 | 60 | MARGINAL |
| 17:00 | 59 | MARGINAL |
| 18:00 | 64 | MARGINAL |
| 19:00 | 63 | MARGINAL |
| 20:00 | 57 | MARGINAL |
| 21:00 | 54 | MARGINAL |
| 22:00 | 54 | MARGINAL |
| 23:00 | 53 | MARGINAL |
| 00:00 | 50 | MARGINAL |
| 01:00 · now | 56 | MARGINAL |