Distance
165.7
km · 103.0 mi
Bearing
111.3°
true · rev 291.3°
Terrain
BLOCKED
126.6 dB diffraction
Propagation
71/100
GOOD
Margin
-78.6
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 ≈ 269 m AGL at the midpoint (808 m above the chord, 404 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 22.8 m) clears with margin. The geometric line of sight is obstructed — buried 463 m below terrain at its worst point.
Great circle
33.74, -98.111 → 33.189, -96.452 · 111.3°
Loss budget · 24 GHz
FSPL (free-space)
164.4
dB
Gaseous (O₂ + H₂O)
5.6
dB
Diffraction
126.6
dB
Rain attenuation
0.0
dB
Total path loss
296.6
dB
Gas rate 0.0337 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 6.9 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
-296.6
dB
RX antenna gain
30.0
dBi
RX power
-218.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-78.6
dB
Path weather · HRRR average of 9 samples
Temperature
80.4 °F
26.9 °C
Dewpoint
43.2 °F
6.2 °C
T/Td gap
37.1 °F
20.6 °C
Abs. humidity
6.9
g/m³
Pressure
977.1
mb
PWAT
13.0
mm
BL depth
2267.5
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
71/100
Rain
100
14%
Humidity
60
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
33.7, -98.1
27.3 °C
4.7 °C
982.9 mb
2360.9
12.1 mm
—
13%
33.7, -97.9
26.5 °C
5.0 °C
979.1 mb
2279.7
11.9 mm
—
25%
33.6, -97.7
25.6 °C
7.0 °C
977.1 mb
2298.9
13.2 mm
—
38%
33.5, -97.5
25.4 °C
8.0 °C
982.7 mb
2057.4
12.1 mm
—
Midpoint
33.5, -97.3
26.3 °C
8.5 °C
986.4 mb
2119.6
13.6 mm
—
63%
33.4, -97.1
27.3 °C
8.1 °C
993.0 mb
2239.7
13.9 mm
—
75%
33.3, -96.9
27.6 °C
5.2 °C
993.6 mb
2274.0
12.7 mm
—
88%
33.3, -96.7
27.8 °C
5.4 °C
994.2 mb
2397.3
14.6 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 74
at 23:00 UTC
· low 65
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 71 | GOOD |
| 21:00 | 73 | GOOD |
| 22:00 | 73 | GOOD |
| 23:00 | 74 | GOOD |
| 00:00 | 72 | GOOD |
| 01:00 | 71 | GOOD |
| 02:00 | 71 | GOOD |
| 03:00 | 74 | GOOD |
| 04:00 | 72 | GOOD |
| 05:00 | 72 | GOOD |
| 06:00 | 72 | GOOD |
| 07:00 | 73 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 71 | GOOD |
| 10:00 | 72 | GOOD |
| 11:00 | 68 | GOOD |
| 12:00 · now | 65 | GOOD |