Distance
129.1
km · 80.2 mi
Bearing
24.5°
true · rev 204.5°
Terrain
BLOCKED
97.2 dB diffraction
Propagation
73/100
GOOD
Margin
-34.8
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 ≈ 164 m AGL at the midpoint (491 m above the chord, 245 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 31.1 m) clears with margin. The geometric line of sight is obstructed — buried 212 m below terrain at its worst point.
Great circle
32.133, -97.026 → 33.189, -96.452 · 24.5°
Loss budget · 10 GHz
FSPL (free-space)
154.7
dB
Gaseous (O₂ + H₂O)
0.9
dB
Diffraction
97.2
dB
Rain attenuation
0.0
dB
Total path loss
252.8
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
-252.8
dB
RX antenna gain
30.0
dBi
RX power
-174.8
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-34.8
dB
Path weather · HRRR average of 9 samples
Temperature
72.8 °F
22.7 °C
Dewpoint
66.0 °F
18.9 °C
T/Td gap
6.8 °F
3.8 °C
Abs. humidity
16.0
g/m³
Pressure
989.2
mb
PWAT
39.7
mm
BL depth
514.8
m AGL
Refrac. gradient
-82.2
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, -96.8
24.5 °C
18.7 °C
997.4 mb
-53.8
505.8
39.5 mm
—
Midpoint
32.7, -96.7
22.5 °C
18.9 °C
996.2 mb
-59.1
526.2
38.2 mm
—
63%
32.8, -96.7
21.2 °C
17.9 °C
999.8 mb
-67.4
451.2
40.0 mm
—
75%
32.9, -96.6
19.5 °C
17.7 °C
998.5 mb
-82.2
402.7
38.6 mm
—
88%
33.1, -96.5
18.9 °C
17.7 °C
999.8 mb
-67.9
433.5
40.5 mm
—
Destination
33.2, -96.5
20.1 °C
17.9 °C
997.2 mb
-58.9
600.2
41.5 mm
—
Midpoint vertical profile
17-hour forecast · this path · 10 GHz
→ steady
Peak 75
at 21:00 UTC
· low 61
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 75 | GOOD |
| 22:00 | 71 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 69 | GOOD |
| 01:00 | 66 | GOOD |
| 02:00 | 61 | MARGINAL |
| 03:00 | 71 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 70 | GOOD |
| 06:00 | 67 | GOOD |
| 07:00 | 67 | GOOD |
| 08:00 | 66 | GOOD |
| 09:00 | 66 | GOOD |
| 10:00 | 70 | GOOD |
| 11:00 | 71 | GOOD |
| 12:00 | 73 | GOOD |
| 13:00 · now | 70 | GOOD |