Distance
279.1
km · 173.4 mi
Bearing
78.1°
true · rev 258.1°
Terrain
BLOCKED
131.8 dB diffraction
Propagation
68/100
GOOD
Margin
-77.1
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 ≈ 764 m AGL at the midpoint (2293 m above the chord, 1146 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 45.8 m) clears with margin. The geometric line of sight is obstructed — buried 1162 m below terrain at its worst point.
Great circle
32.705, -99.387 → 33.189, -96.452 · 78.1°
Loss budget · 10 GHz
FSPL (free-space)
161.4
dB
Gaseous (O₂ + H₂O)
2.0
dB
Diffraction
131.8
dB
Rain attenuation
0.0
dB
Total path loss
295.1
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 6.4 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
-295.1
dB
RX antenna gain
30.0
dBi
RX power
-217.1
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-77.1
dB
Path weather · HRRR average of 9 samples
Temperature
80.6 °F
27.0 °C
Dewpoint
41.5 °F
5.3 °C
T/Td gap
39.1 °F
21.7 °C
Abs. humidity
6.4
g/m³
Pressure
957.2
mb
PWAT
13.3
mm
BL depth
2291.7
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
68/100
Rain
100
14%
Humidity
70
13%
PWAT
75
11%
Season
68
11%
T-Td Depression
55
10%
Refractivity
50
10%
Pressure
88
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-03 20:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.7, -99.4
25.1 °C
6.2 °C
957.2 mb
1983.9
12.8 mm
—
13%
32.8, -99.0
27.1 °C
4.5 °C
974.0 mb
2228.0
12.7 mm
—
25%
32.8, -98.7
26.8 °C
5.2 °C
977.2 mb
2344.2
13.4 mm
—
38%
32.9, -98.3
27.6 °C
3.8 °C
982.7 mb
2303.8
12.1 mm
—
Midpoint
32.9, -97.9
26.7 °C
3.4 °C
974.9 mb
2264.2
12.1 mm
—
63%
33.0, -97.6
27.4 °C
7.7 °C
992.0 mb
2534.8
17.6 mm
—
75%
33.1, -97.2
27.1 °C
6.3 °C
996.2 mb
2253.7
12.1 mm
—
88%
33.1, -96.8
27.3 °C
6.2 °C
995.3 mb
2332.9
14.2 mm
—
Destination
33.2, -96.5
27.8 °C
4.1 °C
995.4 mb
2379.9
13.3 mm
—
Midpoint vertical profile
17-hour forecast · this path · 10 GHz
→ steady
Peak 80
at 10:00 UTC
· low 66
at 23:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 74 | GOOD |
| 21:00 | 73 | GOOD |
| 22:00 | 71 | GOOD |
| 23:00 | 66 | GOOD |
| 00:00 | 66 | GOOD |
| 01:00 | 66 | GOOD |
| 02:00 | 66 | GOOD |
| 03:00 | 69 | GOOD |
| 04:00 | 79 | GOOD |
| 05:00 | 79 | GOOD |
| 06:00 | 78 | GOOD |
| 07:00 | 78 | GOOD |
| 08:00 | 76 | GOOD |
| 09:00 | 78 | GOOD |
| 10:00 | 80 | EXCELLENT |
| 11:00 | 73 | GOOD |
| 12:00 · now | 72 | GOOD |