Distance
246.5
km · 153.1 mi
Bearing
223.2°
true · rev 43.2°
Terrain
BLOCKED
118.1 dB diffraction
Propagation
79/100
GOOD
Margin
-62.1
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 ≈ 596 m AGL at the midpoint (1788 m above the chord, 894 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 43.0 m) clears with margin. The geometric line of sight is obstructed — buried 635 m below terrain at its worst point.
Great circle
34.749, -94.804 → 33.12, -96.615 · 223.2°
Loss budget · 10 GHz
FSPL (free-space)
160.3
dB
Gaseous (O₂ + H₂O)
1.7
dB
Diffraction
118.1
dB
Rain attenuation
0.0
dB
Total path loss
280.1
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 14.2 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
-280.1
dB
RX antenna gain
30.0
dBi
RX power
-202.1
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-62.1
dB
Path weather · HRRR average of 9 samples
Temperature
69.3 °F
20.7 °C
Dewpoint
62.4 °F
16.9 °C
T/Td gap
7.0 °F
3.9 °C
Abs. humidity
14.2
g/m³
Pressure
960.8
mb
PWAT
23.8
mm
BL depth
272.6
m AGL
Refrac. gradient
-147.4
N/km · super-refractive
Propagation factors · 10 GHz
79/100
Rain
100
14%
Humidity
95
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
75
10%
Refractivity
82
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, -94.8
19.5 °C
15.9 °C
960.8 mb
-124.0
316.9
22.2 mm
—
13%
34.5, -95.0
17.7 °C
15.1 °C
967.5 mb
-105.7
292.6
23.2 mm
—
25%
34.3, -95.3
18.5 °C
15.8 °C
975.9 mb
-95.1
294.3
24.8 mm
—
38%
34.1, -95.5
19.7 °C
18.7 °C
993.7 mb
-120.5
301.4
26.9 mm
—
Midpoint
33.9, -95.7
20.5 °C
18.2 °C
994.5 mb
-147.4
227.5
26.9 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, -96.2
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 · 10 GHz
→ steady
Peak 85
at 08:00 UTC
· low 67
at 00:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 85 | EXCELLENT |
| 09:00 | 78 | GOOD |
| 10:00 | 74 | GOOD |
| 11:00 | 74 | GOOD |
| 12:00 | 79 | GOOD |
| 13:00 | 77 | GOOD |
| 14:00 | 76 | GOOD |
| 15:00 | 75 | GOOD |
| 16:00 | 74 | GOOD |
| 17:00 | 74 | GOOD |
| 18:00 | 72 | GOOD |
| 19:00 | 73 | GOOD |
| 20:00 | 70 | GOOD |
| 21:00 | 77 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 68 | GOOD |
| 00:00 | 67 | GOOD |
| 01:00 · now | 70 | GOOD |