Distance
176.3
km · 109.6 mi
Bearing
49.6°
true · rev 229.6°
Terrain
BLOCKED
120.5 dB diffraction
Propagation
70/100
GOOD
Margin
-73.4
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 ≈ 305 m AGL at the midpoint (915 m above the chord, 457 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 23.5 m) clears with margin. The geometric line of sight is obstructed — buried 381 m below terrain at its worst point.
Great circle
32.17, -97.895 → 33.189, -96.452 · 49.6°
Loss budget · 24 GHz
FSPL (free-space)
165.0
dB
Gaseous (O₂ + H₂O)
6.0
dB
Diffraction
120.5
dB
Rain attenuation
0.0
dB
Total path loss
291.4
dB
Gas rate 0.0339 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
-291.4
dB
RX antenna gain
30.0
dBi
RX power
-213.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-73.4
dB
Path weather · HRRR average of 9 samples
Temperature
80.9 °F
27.2 °C
Dewpoint
43.5 °F
6.4 °C
T/Td gap
37.4 °F
20.8 °C
Abs. humidity
6.9
g/m³
Pressure
978.7
mb
PWAT
14.8
mm
BL depth
2301.1
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
70/100
Rain
100
14%
Humidity
59
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
32.2, -97.9
25.2 °C
7.2 °C
978.7 mb
2024.2
13.8 mm
—
13%
32.3, -97.7
27.2 °C
5.9 °C
991.4 mb
2258.3
14.0 mm
—
25%
32.4, -97.5
26.6 °C
6.7 °C
986.1 mb
2276.9
14.0 mm
—
38%
32.6, -97.4
27.1 °C
6.2 °C
987.4 mb
2337.1
14.3 mm
—
Midpoint
32.7, -97.2
27.5 °C
6.6 °C
994.4 mb
2387.0
14.7 mm
—
63%
32.8, -97.0
28.1 °C
6.2 °C
1000.4 mb
2428.7
14.5 mm
—
75%
32.9, -96.8
28.3 °C
5.8 °C
999.3 mb
2376.2
16.3 mm
—
88%
33.1, -96.6
27.1 °C
8.3 °C
997.4 mb
2330.8
17.7 mm
—
Destination
33.2, -96.5
27.6 °C
4.8 °C
995.4 mb
2290.7
13.7 mm
—
Midpoint vertical profile
18-hour forecast · this path · 24 GHz
→ steady
Peak 75
at 04:00 UTC
· low 62
at 11:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 73 | GOOD |
| 21:00 | 73 | GOOD |
| 22:00 | 73 | GOOD |
| 23:00 | 73 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 65 | GOOD |
| 02:00 | 68 | GOOD |
| 03:00 | 73 | GOOD |
| 04:00 | 75 | GOOD |
| 05:00 | 73 | GOOD |
| 06:00 | 72 | GOOD |
| 07:00 | 71 | GOOD |
| 08:00 | 70 | GOOD |
| 09:00 | 70 | GOOD |
| 10:00 | 71 | GOOD |
| 11:00 | 62 | MARGINAL |
| 12:00 | 63 | MARGINAL |
| 13:00 · now | 67 | GOOD |