Distance
253.9
km · 157.8 mi
Bearing
227.5°
true · rev 47.5°
Terrain
BLOCKED
130.2 dB diffraction
Propagation
69/100
GOOD
Margin
-89.3
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 ≈ 633 m AGL at the midpoint (1898 m above the chord, 949 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 28.2 m) clears with margin. The geometric line of sight is obstructed — buried 647 m below terrain at its worst point.
Great circle
34.679, -94.605 → 33.12, -96.615 · 227.5°
Loss budget · 24 GHz
FSPL (free-space)
168.1
dB
Gaseous (O₂ + H₂O)
8.9
dB
Diffraction
130.2
dB
Rain attenuation
0.0
dB
Total path loss
307.3
dB
Gas rate 0.0351 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 7.6 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
-307.3
dB
RX antenna gain
30.0
dBi
RX power
-229.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-89.3
dB
Path weather · HRRR average of 9 samples
Temperature
80.7 °F
27.1 °C
Dewpoint
45.8 °F
7.6 °C
T/Td gap
34.9 °F
19.4 °C
Abs. humidity
7.6
g/m³
Pressure
959.4
mb
PWAT
15.4
mm
BL depth
2218.5
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
69/100
Rain
100
14%
Humidity
52
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
34.7, -94.6
24.9 °C
11.0 °C
977.8 mb
1621.3
15.1 mm
—
13%
34.5, -94.9
22.7 °C
11.8 °C
959.4 mb
1574.8
14.1 mm
—
25%
34.3, -95.1
27.1 °C
9.2 °C
996.7 mb
2328.6
16.2 mm
—
38%
34.1, -95.4
27.4 °C
8.3 °C
996.2 mb
2357.5
15.6 mm
—
Midpoint
33.9, -95.6
28.7 °C
7.3 °C
996.9 mb
2504.0
17.3 mm
—
63%
33.7, -95.9
28.2 °C
7.4 °C
995.6 mb
2386.7
16.4 mm
—
75%
33.5, -96.1
27.9 °C
5.6 °C
991.2 mb
2381.4
15.1 mm
—
88%
33.3, -96.4
28.4 °C
4.4 °C
992.2 mb
2434.7
15.3 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 73
at 23:00 UTC
· low 68
at 06:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 71 | GOOD |
| 21:00 | 71 | GOOD |
| 22:00 | 72 | GOOD |
| 23:00 | 73 | GOOD |
| 00:00 | 72 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 69 | GOOD |
| 03:00 | 72 | GOOD |
| 04:00 | 69 | GOOD |
| 05:00 | 69 | GOOD |
| 06:00 | 68 | GOOD |
| 07:00 | 73 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 72 | GOOD |
| 10:00 | 73 | GOOD |
| 11:00 | 73 | GOOD |
| 12:00 · now | 73 | GOOD |