Distance
253.9
km · 157.8 mi
Bearing
227.5°
true · rev 47.5°
Terrain
BLOCKED
130.0 dB diffraction
Propagation
64/100
MARGINAL
Margin
-92.3
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 641 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)
12.1
dB
Diffraction
130.0
dB
Rain attenuation
0.0
dB
Total path loss
310.3
dB
Gas rate 0.0478 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 13.9 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
-310.3
dB
RX antenna gain
30.0
dBi
RX power
-232.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-92.3
dB
Path weather · HRRR average of 9 samples
Temperature
69.2 °F
20.7 °C
Dewpoint
61.7 °F
16.5 °C
T/Td gap
7.4 °F
4.1 °C
Abs. humidity
13.9
g/m³
Pressure
955.7
mb
PWAT
24.1
mm
BL depth
273.2
m AGL
Refrac. gradient
-204.2
N/km · ducting
Propagation factors · 24 GHz
64/100
Rain
100
14%
Humidity
2
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
38
10%
Refractivity
85
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
34.7, -94.6
19.4 °C
15.1 °C
973.9 mb
-140.1
313.4
24.3 mm
—
13%
34.5, -94.9
18.9 °C
15.6 °C
955.7 mb
-113.6
294.8
22.3 mm
—
25%
34.3, -95.1
17.5 °C
15.3 °C
992.9 mb
-109.6
284.7
26.5 mm
—
38%
34.1, -95.4
19.6 °C
17.3 °C
991.8 mb
-110.8
292.6
27.2 mm
—
Midpoint
33.9, -95.6
19.9 °C
17.4 °C
992.2 mb
-204.2
252.4
25.9 mm
—
63%
33.7, -95.9
21.4 °C
17.3 °C
990.1 mb
-102.0
256.3
23.9 mm
—
75%
33.5, -96.1
22.7 °C
17.5 °C
985.4 mb
-103.3
247.9
22.8 mm
—
88%
33.3, -96.4
22.6 °C
17.1 °C
986.2 mb
-122.6
250.2
22.0 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 64
at 13:00 UTC
· low 54
at 23:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 61 | MARGINAL |
| 09:00 | 61 | MARGINAL |
| 10:00 | 60 | MARGINAL |
| 11:00 | 59 | MARGINAL |
| 12:00 | 63 | MARGINAL |
| 13:00 | 64 | MARGINAL |
| 14:00 | 63 | MARGINAL |
| 15:00 | 62 | MARGINAL |
| 16:00 | 60 | MARGINAL |
| 17:00 | 60 | MARGINAL |
| 18:00 | 56 | MARGINAL |
| 19:00 | 58 | MARGINAL |
| 20:00 | 59 | MARGINAL |
| 21:00 | 61 | MARGINAL |
| 22:00 | 62 | MARGINAL |
| 23:00 | 54 | MARGINAL |
| 00:00 | 55 | MARGINAL |
| 01:00 · now | 58 | MARGINAL |