Distance
116.3
km · 72.2 mi
Bearing
19.2°
true · rev 199.2°
Terrain
BLOCKED
95.2 dB diffraction
Propagation
73/100
GOOD
Margin
-31.8
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 ≈ 133 m AGL at the midpoint (398 m above the chord, 199 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 29.5 m) clears with margin. The geometric line of sight is obstructed — buried 181 m below terrain at its worst point.
Great circle
32.133, -97.026 → 33.12, -96.615 · 19.2°
Loss budget · 10 GHz
FSPL (free-space)
153.7
dB
Gaseous (O₂ + H₂O)
0.8
dB
Diffraction
95.2
dB
Rain attenuation
0.0
dB
Total path loss
249.8
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 16.0 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
-249.8
dB
RX antenna gain
30.0
dBi
RX power
-171.8
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-31.8
dB
Path weather · HRRR average of 9 samples
Temperature
72.8 °F
22.7 °C
Dewpoint
66.1 °F
18.9 °C
T/Td gap
6.7 °F
3.7 °C
Abs. humidity
16.0
g/m³
Pressure
989.2
mb
PWAT
39.4
mm
BL depth
495.6
m AGL
Refrac. gradient
-76.4
N/km
Propagation factors · 10 GHz
73/100
Rain
100
14%
Humidity
95
13%
PWAT
70
11%
Season
68
11%
T-Td Depression
75
10%
Refractivity
68
10%
Pressure
82
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
32.1, -97.0
26.2 °C
20.9 °C
989.2 mb
-52.1
684.7
39.1 mm
—
13%
32.3, -97.0
25.6 °C
20.5 °C
992.2 mb
-55.7
531.7
40.5 mm
—
25%
32.4, -96.9
25.4 °C
19.7 °C
993.9 mb
-58.1
496.9
39.8 mm
—
38%
32.5, -96.9
23.4 °C
19.2 °C
990.9 mb
-66.5
468.6
38.2 mm
—
Midpoint
32.6, -96.8
21.8 °C
18.8 °C
993.3 mb
-55.1
502.6
41.5 mm
—
63%
32.7, -96.8
21.9 °C
18.1 °C
1001.4 mb
-76.4
448.2
39.5 mm
—
75%
32.9, -96.7
20.7 °C
17.6 °C
998.3 mb
-73.4
433.5
37.3 mm
—
88%
33.0, -96.7
19.7 °C
18.0 °C
998.0 mb
-71.9
438.2
38.7 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 75
at 22:00 UTC
· low 66
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 67 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 68 | GOOD |
| 02:00 | 66 | GOOD |
| 03:00 | 69 | GOOD |
| 04:00 | 69 | GOOD |
| 05:00 | 70 | GOOD |
| 06:00 | 68 | GOOD |
| 07:00 | 69 | GOOD |
| 08:00 | 68 | GOOD |
| 09:00 | 68 | GOOD |
| 10:00 | 73 | GOOD |
| 11:00 | 69 | GOOD |
| 12:00 | 74 | GOOD |
| 13:00 · now | 73 | GOOD |