Distance
149.4
km · 92.9 mi
Bearing
154.5°
true · rev 334.5°
Terrain
BLOCKED
105.9 dB diffraction
Propagation
68/100
GOOD
Margin
-44.9
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 ≈ 219 m AGL at the midpoint (657 m above the chord, 329 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 33.5 m) clears with margin. The geometric line of sight is obstructed — buried 311 m below terrain at its worst point.
Great circle
34.404, -97.142 → 33.189, -96.452 · 154.5°
Loss budget · 10 GHz
FSPL (free-space)
155.9
dB
Gaseous (O₂ + H₂O)
1.1
dB
Diffraction
105.9
dB
Rain attenuation
0.0
dB
Total path loss
262.9
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 6.7 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
-262.9
dB
RX antenna gain
30.0
dBi
RX power
-184.9
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-44.9
dB
Path weather · HRRR average of 9 samples
Temperature
81.8 °F
27.6 °C
Dewpoint
42.7 °F
5.9 °C
T/Td gap
39.1 °F
21.7 °C
Abs. humidity
6.7
g/m³
Pressure
972.7
mb
PWAT
14.0
mm
BL depth
2320.7
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
68/100
Rain
100
14%
Humidity
70
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
34.4, -97.1
26.3 °C
7.3 °C
972.7 mb
2215.4
13.6 mm
—
13%
34.3, -97.1
28.2 °C
6.3 °C
989.9 mb
2372.0
13.6 mm
—
25%
34.1, -97.0
28.1 °C
5.4 °C
985.1 mb
2345.5
12.9 mm
—
38%
33.9, -96.9
28.3 °C
7.0 °C
989.4 mb
2462.5
15.9 mm
—
Midpoint
33.8, -96.8
27.9 °C
6.4 °C
992.8 mb
2295.2
14.3 mm
—
63%
33.6, -96.7
27.3 °C
6.7 °C
990.2 mb
2245.2
14.7 mm
—
75%
33.5, -96.6
27.3 °C
5.2 °C
987.4 mb
2239.8
13.8 mm
—
88%
33.3, -96.5
27.6 °C
5.0 °C
993.6 mb
2330.6
13.9 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 65
at 01:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 73 | GOOD |
| 21:00 | 72 | GOOD |
| 22:00 | 72 | GOOD |
| 23:00 | 72 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 65 | GOOD |
| 02:00 | 66 | GOOD |
| 03:00 | 68 | GOOD |
| 04:00 | 77 | GOOD |
| 05:00 | 77 | GOOD |
| 06:00 | 78 | GOOD |
| 07:00 | 77 | GOOD |
| 08:00 | 78 | GOOD |
| 09:00 | 78 | GOOD |
| 10:00 | 81 | EXCELLENT |
| 11:00 | 82 | EXCELLENT |
| 12:00 · now | 76 | GOOD |