Distance
237.7
km · 147.7 mi
Bearing
226.3°
true · rev 46.3°
Terrain
BLOCKED
127.1 dB diffraction
Propagation
69/100
GOOD
Margin
-85.0
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 ≈ 554 m AGL at the midpoint (1662 m above the chord, 831 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 27.3 m) clears with margin. The geometric line of sight is obstructed — buried 540 m below terrain at its worst point.
Great circle
34.679, -94.605 → 33.189, -96.452 · 226.3°
Loss budget · 24 GHz
FSPL (free-space)
167.6
dB
Gaseous (O₂ + H₂O)
8.3
dB
Diffraction
127.1
dB
Rain attenuation
0.0
dB
Total path loss
303.0
dB
Gas rate 0.0351 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 7.5 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
-303.0
dB
RX antenna gain
30.0
dBi
RX power
-225.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-85.0
dB
Path weather · HRRR average of 9 samples
Temperature
80.7 °F
27.1 °C
Dewpoint
45.7 °F
7.6 °C
T/Td gap
35.0 °F
19.5 °C
Abs. humidity
7.5
g/m³
Pressure
959.4
mb
PWAT
15.7
mm
BL depth
2250.4
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, -94.8
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, -95.3
27.5 °C
7.8 °C
992.8 mb
2329.7
15.1 mm
—
Midpoint
33.9, -95.5
29.0 °C
7.2 °C
1000.0 mb
2608.1
17.9 mm
—
63%
33.7, -95.8
27.9 °C
6.3 °C
995.7 mb
2337.8
15.3 mm
—
75%
33.6, -96.0
28.1 °C
6.2 °C
994.0 mb
2581.2
18.1 mm
—
88%
33.4, -96.2
28.4 °C
4.9 °C
991.2 mb
2492.0
16.1 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 01:00 UTC
· low 68
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 69 | GOOD |
| 21:00 | 72 | GOOD |
| 22:00 | 73 | GOOD |
| 23:00 | 72 | GOOD |
| 00:00 | 72 | GOOD |
| 01:00 | 74 | GOOD |
| 02:00 | 68 | GOOD |
| 03:00 | 72 | GOOD |
| 04:00 | 69 | GOOD |
| 05:00 | 69 | GOOD |
| 06:00 | 69 | GOOD |
| 07:00 | 69 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 72 | GOOD |
| 10:00 | 72 | GOOD |
| 11:00 | 74 | GOOD |
| 12:00 · now | 74 | GOOD |