Distance
241.7
km · 150.2 mi
Bearing
94.9°
true · rev 274.9°
Terrain
BLOCKED
125.4 dB diffraction
Propagation
76/100
GOOD
Margin
-69.2
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 ≈ 573 m AGL at the midpoint (1719 m above the chord, 859 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 42.6 m) clears with margin. The geometric line of sight is obstructed — buried 853 m below terrain at its worst point.
Great circle
33.333, -99.201 → 33.12, -96.615 · 94.9°
Loss budget · 10 GHz
FSPL (free-space)
160.1
dB
Gaseous (O₂ + H₂O)
1.7
dB
Diffraction
125.4
dB
Rain attenuation
0.0
dB
Total path loss
287.2
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 12.3 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
-287.2
dB
RX antenna gain
30.0
dBi
RX power
-209.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-69.2
dB
Path weather · HRRR average of 9 samples
Temperature
74.3 °F
23.5 °C
Dewpoint
58.7 °F
14.8 °C
T/Td gap
15.5 °F
8.6 °C
Abs. humidity
12.3
g/m³
Pressure
956.9
mb
PWAT
26.4
mm
BL depth
288.6
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
33.3, -99.2
25.0 °C
11.2 °C
956.9 mb
-58.3
161.1
26.2 mm
—
13%
33.3, -98.9
25.7 °C
12.8 °C
965.8 mb
-82.4
304.7
27.7 mm
—
25%
33.3, -98.6
23.6 °C
12.8 °C
963.4 mb
-66.3
350.6
26.4 mm
—
38%
33.3, -98.2
23.4 °C
12.9 °C
970.4 mb
-54.0
316.6
27.5 mm
—
Midpoint
33.2, -97.9
22.9 °C
16.6 °C
978.8 mb
-83.6
351.3
30.5 mm
—
63%
33.2, -97.6
21.8 °C
17.1 °C
977.7 mb
-77.9
314.6
28.5 mm
—
75%
33.2, -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 81
at 17:00 UTC
· low 66
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 75 | GOOD |
| 09:00 | 76 | GOOD |
| 10:00 | 77 | GOOD |
| 11:00 | 79 | GOOD |
| 12:00 | 78 | GOOD |
| 13:00 | 77 | GOOD |
| 14:00 | 77 | GOOD |
| 15:00 | 76 | GOOD |
| 16:00 | 74 | GOOD |
| 17:00 | 81 | EXCELLENT |
| 18:00 | 79 | GOOD |
| 19:00 | 73 | GOOD |
| 20:00 | 68 | GOOD |
| 21:00 | 68 | GOOD |
| 22:00 | 66 | GOOD |
| 23:00 | 68 | GOOD |
| 00:00 | 73 | GOOD |
| 01:00 · now | 72 | GOOD |