Distance
117.8
km · 73.2 mi
Bearing
304.3°
true · rev 124.3°
Terrain
BLOCKED
94.9 dB diffraction
Propagation
72/100
GOOD
Margin
-31.6
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 ≈ 136 m AGL at the midpoint (409 m above the chord, 204 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 29.7 m) clears with margin. The geometric line of sight is obstructed — buried 186 m below terrain at its worst point.
Great circle
32.527, -95.57 → 33.12, -96.615 · 304.3°
Loss budget · 10 GHz
FSPL (free-space)
153.9
dB
Gaseous (O₂ + H₂O)
0.8
dB
Diffraction
94.9
dB
Rain attenuation
0.0
dB
Total path loss
249.6
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 15.3 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
-249.6
dB
RX antenna gain
30.0
dBi
RX power
-171.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-31.6
dB
Path weather · HRRR average of 9 samples
Temperature
71.7 °F
22.1 °C
Dewpoint
64.6 °F
18.1 °C
T/Td gap
7.1 °F
4.0 °C
Abs. humidity
15.3
g/m³
Pressure
995.0
mb
PWAT
39.4
mm
BL depth
484.5
m AGL
Refrac. gradient
-92.4
N/km
Propagation factors · 10 GHz
72/100
Rain
100
14%
Humidity
95
13%
PWAT
70
11%
Season
68
11%
T-Td Depression
75
10%
Refractivity
68
10%
Pressure
70
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-10 21:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.5, -95.6
26.3 °C
19.6 °C
997.3 mb
-70.4
567.3
38.1 mm
—
13%
32.6, -95.7
25.8 °C
18.3 °C
999.5 mb
-56.9
591.2
38.3 mm
—
25%
32.7, -95.8
24.9 °C
18.4 °C
996.6 mb
-59.1
516.5
39.7 mm
—
38%
32.7, -96.0
22.8 °C
18.2 °C
999.5 mb
-92.4
447.0
39.3 mm
—
Midpoint
32.8, -96.1
21.6 °C
18.0 °C
999.0 mb
-73.3
472.2
38.3 mm
—
63%
32.9, -96.2
20.3 °C
17.7 °C
999.3 mb
-54.1
491.2
39.3 mm
—
75%
33.0, -96.4
18.7 °C
17.4 °C
996.5 mb
-63.4
385.7
41.0 mm
—
88%
33.0, -96.5
18.9 °C
17.7 °C
999.8 mb
-67.9
433.5
40.5 mm
—
Destination
33.1, -96.6
19.4 °C
17.8 °C
995.0 mb
-62.2
456.2
40.3 mm
—
Midpoint vertical profile
17-hour forecast · this path · 10 GHz
→ steady
Peak 72
at 12:00 UTC
· low 60
at 03:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 70 | GOOD |
| 22:00 | 69 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 69 | GOOD |
| 01:00 | 70 | GOOD |
| 02:00 | 65 | GOOD |
| 03:00 | 60 | MARGINAL |
| 04:00 | 69 | GOOD |
| 05:00 | 68 | GOOD |
| 06:00 | 68 | GOOD |
| 07:00 | 68 | GOOD |
| 08:00 | 67 | GOOD |
| 09:00 | 67 | GOOD |
| 10:00 | 68 | GOOD |
| 11:00 | 67 | GOOD |
| 12:00 | 72 | GOOD |
| 13:00 · now | 72 | GOOD |