Distance
268.0
km · 166.6 mi
Bearing
230.0°
true · rev 50.0°
Terrain
BLOCKED
121.7 dB diffraction
Propagation
69/100
GOOD
Margin
-66.6
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 ≈ 705 m AGL at the midpoint (2114 m above the chord, 1057 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 44.8 m) clears with margin. The geometric line of sight is obstructed — buried 754 m below terrain at its worst point.
Great circle
34.689, -94.411 → 33.12, -96.615 · 230.0°
Loss budget · 10 GHz
FSPL (free-space)
161.0
dB
Gaseous (O₂ + H₂O)
1.9
dB
Diffraction
121.7
dB
Rain attenuation
0.0
dB
Total path loss
284.6
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 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
-284.6
dB
RX antenna gain
30.0
dBi
RX power
-206.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-66.6
dB
Path weather · HRRR average of 9 samples
Temperature
80.9 °F
27.2 °C
Dewpoint
45.5 °F
7.5 °C
T/Td gap
35.5 °F
19.7 °C
Abs. humidity
7.5
g/m³
Pressure
979.5
mb
PWAT
15.5
mm
BL depth
2233.4
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
34.7, -94.4
25.2 °C
10.3 °C
979.5 mb
1689.5
15.6 mm
—
13%
34.5, -94.7
24.7 °C
11.7 °C
985.4 mb
1702.5
15.7 mm
—
25%
34.3, -95.0
25.8 °C
10.1 °C
989.4 mb
2239.0
15.6 mm
—
38%
34.1, -95.2
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%
33.5, -96.1
27.9 °C
5.6 °C
991.2 mb
2381.4
15.1 mm
—
88%
33.3, -96.3
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 · 10 GHz
→ steady
Peak 83
at 12:00 UTC
· low 65
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 72 | GOOD |
| 21:00 | 72 | GOOD |
| 22:00 | 72 | GOOD |
| 23:00 | 72 | GOOD |
| 00:00 | 72 | GOOD |
| 01:00 | 74 | GOOD |
| 02:00 | 65 | GOOD |
| 03:00 | 68 | GOOD |
| 04:00 | 71 | GOOD |
| 05:00 | 70 | GOOD |
| 06:00 | 71 | GOOD |
| 07:00 | 71 | GOOD |
| 08:00 | 77 | GOOD |
| 09:00 | 78 | GOOD |
| 10:00 | 81 | EXCELLENT |
| 11:00 | 82 | EXCELLENT |
| 12:00 · now | 83 | EXCELLENT |