Distance
338.7
km · 210.5 mi
Bearing
230.4°
true · rev 50.4°
Terrain
BLOCKED
135.7 dB diffraction
Propagation
69/100
GOOD
Margin
-83.1
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 ≈ 1126 m AGL at the midpoint (3377 m above the chord, 1688 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 50.4 m) clears with margin. The geometric line of sight is obstructed — buried 1417 m below terrain at its worst point.
Great circle
35.164, -93.648 → 33.189, -96.452 · 230.4°
Loss budget · 10 GHz
FSPL (free-space)
163.0
dB
Gaseous (O₂ + H₂O)
2.4
dB
Diffraction
135.7
dB
Rain attenuation
0.0
dB
Total path loss
301.1
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 7.9 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
-301.1
dB
RX antenna gain
30.0
dBi
RX power
-223.1
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-83.1
dB
Path weather · HRRR average of 9 samples
Temperature
79.9 °F
26.6 °C
Dewpoint
46.7 °F
8.2 °C
T/Td gap
33.1 °F
18.4 °C
Abs. humidity
7.9
g/m³
Pressure
976.1
mb
PWAT
15.5
mm
BL depth
2117.6
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
69/100
Rain
100
14%
Humidity
82
13%
PWAT
75
11%
Season
68
11%
T-Td Depression
55
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
35.2, -93.6
26.6 °C
9.4 °C
999.2 mb
2119.4
16.9 mm
—
13%
34.9, -94.0
24.8 °C
10.0 °C
980.7 mb
1872.5
15.7 mm
—
25%
34.7, -94.3
24.1 °C
11.4 °C
976.1 mb
1426.3
15.1 mm
—
38%
34.4, -94.7
24.8 °C
11.2 °C
985.5 mb
1760.2
14.7 mm
—
Midpoint
34.2, -95.1
27.4 °C
7.8 °C
994.3 mb
2335.0
14.9 mm
—
63%
33.9, -95.4
28.6 °C
6.7 °C
1001.2 mb
2463.7
16.8 mm
—
75%
33.7, -95.8
27.8 °C
5.7 °C
994.5 mb
2376.5
15.7 mm
—
88%
33.4, -96.1
27.4 °C
7.4 °C
994.0 mb
2324.4
16.7 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 · 10 GHz
→ steady
Peak 82
at 11:00 UTC
· low 71
at 03:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 73 | GOOD |
| 22:00 | 74 | GOOD |
| 23:00 | 73 | GOOD |
| 00:00 | 75 | GOOD |
| 01:00 | 75 | GOOD |
| 02:00 | 75 | GOOD |
| 03:00 | 71 | GOOD |
| 04:00 | 71 | GOOD |
| 05:00 | 71 | GOOD |
| 06:00 | 71 | GOOD |
| 07:00 | 72 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 81 | EXCELLENT |
| 10:00 | 80 | EXCELLENT |
| 11:00 | 82 | EXCELLENT |
| 12:00 · now | 81 | EXCELLENT |