Distance
244.3
km · 151.8 mi
Bearing
84.2°
true · rev 264.2°
Terrain
BLOCKED
127.7 dB diffraction
Propagation
76/100
GOOD
Margin
-71.7
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 ≈ 586 m AGL at the midpoint (1757 m above the chord, 878 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 42.8 m) clears with margin. The geometric line of sight is obstructed — buried 935 m below terrain at its worst point.
Great circle
32.926, -99.226 → 33.12, -96.615 · 84.2°
Loss budget · 10 GHz
FSPL (free-space)
160.2
dB
Gaseous (O₂ + H₂O)
1.7
dB
Diffraction
127.7
dB
Rain attenuation
0.0
dB
Total path loss
289.7
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 12.5 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
-289.7
dB
RX antenna gain
30.0
dBi
RX power
-211.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-71.7
dB
Path weather · HRRR average of 9 samples
Temperature
74.2 °F
23.5 °C
Dewpoint
59.2 °F
15.1 °C
T/Td gap
15.1 °F
8.4 °C
Abs. humidity
12.5
g/m³
Pressure
962.5
mb
PWAT
27.4
mm
BL depth
278.9
m AGL
Refrac. gradient
-91.5
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
32.9, -99.2
24.7 °C
15.1 °C
962.5 mb
-90.4
152.3
31.5 mm
—
13%
33.0, -98.9
23.2 °C
13.8 °C
965.2 mb
-57.7
261.0
30.5 mm
—
25%
33.0, -98.6
24.9 °C
12.2 °C
970.5 mb
-58.4
316.8
30.2 mm
—
38%
33.0, -98.2
22.7 °C
14.0 °C
971.6 mb
-82.4
326.4
28.9 mm
—
Midpoint
33.0, -97.9
23.9 °C
14.3 °C
967.5 mb
-78.6
328.3
27.3 mm
—
63%
33.0, -97.6
22.9 °C
16.5 °C
978.6 mb
-82.5
326.9
27.8 mm
—
75%
33.1, -97.3
21.3 °C
16.7 °C
983.4 mb
-85.7
259.1
24.9 mm
—
88%
33.1, -96.9
23.5 °C
17.3 °C
990.4 mb
-59.5
272.6
23.5 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 77
at 14:00 UTC
· low 64
at 21:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 73 | GOOD |
| 09:00 | 72 | GOOD |
| 10:00 | 72 | GOOD |
| 11:00 | 75 | GOOD |
| 12:00 | 76 | GOOD |
| 13:00 | 75 | GOOD |
| 14:00 | 77 | GOOD |
| 15:00 | 76 | GOOD |
| 16:00 | 73 | GOOD |
| 17:00 | 72 | GOOD |
| 18:00 | 76 | GOOD |
| 19:00 | 69 | GOOD |
| 20:00 | 69 | GOOD |
| 21:00 | 64 | MARGINAL |
| 22:00 | 68 | GOOD |
| 23:00 | 68 | GOOD |
| 00:00 | 66 | GOOD |
| 01:00 · now | 69 | GOOD |