Distance
116.3
km · 72.2 mi
Bearing
19.2°
true · rev 199.2°
Terrain
BLOCKED
94.7 dB diffraction
Propagation
79/100
GOOD
Margin
-31.2
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 177 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
94.7
dB
Rain attenuation
0.0
dB
Total path loss
249.2
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 14.3 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
-249.2
dB
RX antenna gain
30.0
dBi
RX power
-171.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-31.2
dB
Path weather · HRRR average of 9 samples
Temperature
71.6 °F
22.0 °C
Dewpoint
62.7 °F
17.1 °C
T/Td gap
8.9 °F
4.9 °C
Abs. humidity
14.3
g/m³
Pressure
987.0
mb
PWAT
23.1
mm
BL depth
228.5
m AGL
Refrac. gradient
-133.8
N/km · super-refractive
Propagation factors · 10 GHz
79/100
Rain
100
14%
Humidity
95
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
85
10%
Refractivity
82
10%
Pressure
82
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
55
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-15 08:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.1, -97.0
20.3 °C
17.3 °C
987.2 mb
-121.2
172.3
21.2 mm
—
13%
32.3, -97.0
21.0 °C
17.1 °C
989.3 mb
-127.9
189.4
21.7 mm
—
25%
32.4, -96.9
21.7 °C
16.9 °C
990.6 mb
-133.8
235.4
23.4 mm
—
38%
32.5, -96.9
21.9 °C
16.7 °C
987.0 mb
-101.8
215.1
23.3 mm
—
Midpoint
32.6, -96.8
21.2 °C
17.1 °C
988.2 mb
-92.1
201.3
23.9 mm
—
63%
32.7, -96.8
22.4 °C
17.6 °C
995.8 mb
-103.8
256.6
24.8 mm
—
75%
32.9, -96.7
23.3 °C
17.1 °C
992.3 mb
-101.9
274.3
24.2 mm
—
88%
33.0, -96.7
22.2 °C
17.8 °C
991.0 mb
-90.0
245.8
23.3 mm
—
Destination
33.1, -96.6
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 mm
—
Midpoint vertical profile
18-hour forecast · this path · 10 GHz
→ steady
Peak 80
at 18:00 UTC
· low 73
at 20:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 75 | GOOD |
| 09:00 | 79 | GOOD |
| 10:00 | 79 | GOOD |
| 11:00 | 78 | GOOD |
| 12:00 | 78 | GOOD |
| 13:00 | 78 | GOOD |
| 14:00 | 78 | GOOD |
| 15:00 | 78 | GOOD |
| 16:00 | 76 | GOOD |
| 17:00 | 78 | GOOD |
| 18:00 | 80 | EXCELLENT |
| 19:00 | 80 | EXCELLENT |
| 20:00 | 73 | GOOD |
| 21:00 | 80 | EXCELLENT |
| 22:00 | 73 | GOOD |
| 23:00 | 75 | GOOD |
| 00:00 | 78 | GOOD |
| 01:00 · now | 76 | GOOD |