Distance
164.4
km · 102.2 mi
Bearing
93.0°
true · rev 273.0°
Terrain
BLOCKED
108.2 dB diffraction
Propagation
78/100
GOOD
Margin
-48.1
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 ≈ 265 m AGL at the midpoint (796 m above the chord, 398 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 35.1 m) clears with margin. The geometric line of sight is obstructed — buried 360 m below terrain at its worst point.
Great circle
33.209, -98.379 → 33.12, -96.615 · 93.0°
Loss budget · 10 GHz
FSPL (free-space)
156.8
dB
Gaseous (O₂ + H₂O)
1.1
dB
Diffraction
108.2
dB
Rain attenuation
0.0
dB
Total path loss
266.1
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 12.8 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
-266.1
dB
RX antenna gain
30.0
dBi
RX power
-188.1
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-48.1
dB
Path weather · HRRR average of 9 samples
Temperature
73.5 °F
23.1 °C
Dewpoint
59.7 °F
15.4 °C
T/Td gap
13.8 °F
7.6 °C
Abs. humidity
12.8
g/m³
Pressure
964.3
mb
PWAT
25.9
mm
BL depth
280.8
m AGL
Refrac. gradient
-94.3
N/km
Propagation factors · 10 GHz
78/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
85
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
33.2, -98.4
23.7 °C
12.5 °C
964.3 mb
-66.3
326.6
25.8 mm
—
13%
33.2, -98.2
22.8 °C
14.0 °C
973.5 mb
-70.3
259.2
29.0 mm
—
25%
33.2, -97.9
23.0 °C
14.6 °C
973.0 mb
-94.3
257.1
29.2 mm
—
38%
33.2, -97.7
23.5 °C
15.7 °C
979.2 mb
-71.1
337.1
29.2 mm
—
Midpoint
33.2, -97.5
22.2 °C
16.9 °C
976.3 mb
-89.7
269.4
27.0 mm
—
63%
33.2, -97.3
21.3 °C
16.7 °C
983.4 mb
-85.7
259.1
24.9 mm
—
75%
33.1, -97.1
23.5 °C
17.3 °C
990.4 mb
-59.5
272.6
23.5 mm
—
88%
33.1, -96.8
23.5 °C
15.0 °C
988.3 mb
-69.0
279.1
22.7 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 85
at 15:00 UTC
· low 68
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 75 | GOOD |
| 09:00 | 76 | GOOD |
| 10:00 | 77 | GOOD |
| 11:00 | 78 | GOOD |
| 12:00 | 76 | GOOD |
| 13:00 | 78 | GOOD |
| 14:00 | 76 | GOOD |
| 15:00 | 85 | EXCELLENT |
| 16:00 | 76 | GOOD |
| 17:00 | 74 | GOOD |
| 18:00 | 77 | GOOD |
| 19:00 | 78 | GOOD |
| 20:00 | 78 | GOOD |
| 21:00 | 71 | GOOD |
| 22:00 | 68 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 70 | GOOD |
| 01:00 · now | 70 | GOOD |