Distance
158.4
km · 98.4 mi
Bearing
63.3°
true · rev 243.3°
Terrain
BLOCKED
106.2 dB diffraction
Propagation
76/100
GOOD
Margin
-45.8
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 ≈ 246 m AGL at the midpoint (738 m above the chord, 369 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 34.5 m) clears with margin. The geometric line of sight is obstructed — buried 314 m below terrain at its worst point.
Great circle
32.488, -98.135 → 33.12, -96.615 · 63.3°
Loss budget · 10 GHz
FSPL (free-space)
156.4
dB
Gaseous (O₂ + H₂O)
1.1
dB
Diffraction
106.2
dB
Rain attenuation
0.0
dB
Total path loss
263.8
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 12.6 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
-263.8
dB
RX antenna gain
30.0
dBi
RX power
-185.8
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-45.8
dB
Path weather · HRRR average of 9 samples
Temperature
74.2 °F
23.4 °C
Dewpoint
59.3 °F
15.1 °C
T/Td gap
14.9 °F
8.3 °C
Abs. humidity
12.6
g/m³
Pressure
973.3
mb
PWAT
24.8
mm
BL depth
281.5
m AGL
Refrac. gradient
-96.9
N/km
Propagation factors · 10 GHz
76/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
70
10%
Refractivity
68
10%
Pressure
88
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
32.5, -98.1
23.5 °C
13.7 °C
973.3 mb
-60.6
241.7
27.2 mm
—
13%
32.6, -97.9
23.9 °C
14.3 °C
980.7 mb
-72.9
258.1
27.7 mm
—
25%
32.6, -97.8
23.0 °C
15.9 °C
976.5 mb
-92.6
307.4
25.9 mm
—
38%
32.7, -97.6
21.5 °C
16.0 °C
973.9 mb
-96.9
245.5
25.3 mm
—
Midpoint
32.8, -97.4
23.0 °C
15.1 °C
989.3 mb
-70.3
263.9
24.8 mm
—
63%
32.9, -97.2
23.4 °C
14.6 °C
988.9 mb
-58.5
292.7
23.8 mm
—
75%
33.0, -97.0
23.9 °C
15.1 °C
991.6 mb
-64.9
347.1
23.5 mm
—
88%
33.0, -96.8
24.5 °C
15.6 °C
986.8 mb
-81.7
310.9
22.9 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 81
at 16:00 UTC
· low 70
at 20:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 74 | GOOD |
| 09:00 | 77 | GOOD |
| 10:00 | 77 | GOOD |
| 11:00 | 79 | GOOD |
| 12:00 | 78 | GOOD |
| 13:00 | 78 | GOOD |
| 14:00 | 79 | GOOD |
| 15:00 | 77 | GOOD |
| 16:00 | 81 | EXCELLENT |
| 17:00 | 72 | GOOD |
| 18:00 | 74 | GOOD |
| 19:00 | 80 | EXCELLENT |
| 20:00 | 70 | GOOD |
| 21:00 | 78 | GOOD |
| 22:00 | 71 | GOOD |
| 23:00 | 71 | GOOD |
| 00:00 | 70 | GOOD |
| 01:00 · now | 73 | GOOD |