Distance
265.4
km · 164.9 mi
Bearing
101.3°
true · rev 281.3°
Terrain
BLOCKED
141.7 dB diffraction
Propagation
65/100
GOOD
Margin
-103.6
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 ≈ 691 m AGL at the midpoint (2073 m above the chord, 1037 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 28.8 m) clears with margin. The geometric line of sight is obstructed — buried 1064 m below terrain at its worst point.
Great circle
33.621, -99.41 → 33.12, -96.615 · 101.3°
Loss budget · 24 GHz
FSPL (free-space)
168.5
dB
Gaseous (O₂ + H₂O)
11.3
dB
Diffraction
141.7
dB
Rain attenuation
0.0
dB
Total path loss
321.6
dB
Gas rate 0.0428 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 11.4 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
-321.6
dB
RX antenna gain
30.0
dBi
RX power
-243.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-103.6
dB
Path weather · HRRR average of 9 samples
Temperature
75.9 °F
24.4 °C
Dewpoint
56.5 °F
13.6 °C
T/Td gap
19.3 °F
10.7 °C
Abs. humidity
11.4
g/m³
Pressure
958.7
mb
PWAT
25.3
mm
BL depth
298.0
m AGL
Refrac. gradient
-111.8
N/km · super-refractive
Propagation factors · 24 GHz
65/100
Rain
100
14%
Humidity
10
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
80
10%
Refractivity
72
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
33.6, -99.4
27.5 °C
9.0 °C
958.7 mb
-44.6
298.2
25.4 mm
—
13%
33.6, -99.1
29.0 °C
6.8 °C
960.8 mb
-42.5
286.6
23.2 mm
—
25%
33.5, -98.7
25.6 °C
10.0 °C
967.5 mb
-71.7
276.0
23.8 mm
—
38%
33.4, -98.4
23.7 °C
12.6 °C
969.8 mb
-62.9
324.4
24.9 mm
—
Midpoint
33.4, -98.0
22.6 °C
15.8 °C
971.7 mb
-81.0
327.1
29.2 mm
—
63%
33.3, -97.7
21.8 °C
17.1 °C
977.7 mb
-77.9
314.6
28.5 mm
—
75%
33.2, -97.3
21.6 °C
18.0 °C
980.7 mb
-111.8
315.8
27.0 mm
—
88%
33.2, -97.0
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 · 24 GHz
→ steady
Peak 64
at 17:00 UTC
· low 53
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 61 | MARGINAL |
| 09:00 | 60 | MARGINAL |
| 10:00 | 63 | MARGINAL |
| 11:00 | 63 | MARGINAL |
| 12:00 | 62 | MARGINAL |
| 13:00 | 61 | MARGINAL |
| 14:00 | 60 | MARGINAL |
| 15:00 | 63 | MARGINAL |
| 16:00 | 59 | MARGINAL |
| 17:00 | 64 | MARGINAL |
| 18:00 | 60 | MARGINAL |
| 19:00 | 55 | MARGINAL |
| 20:00 | 54 | MARGINAL |
| 21:00 | 54 | MARGINAL |
| 22:00 | 53 | MARGINAL |
| 23:00 | 53 | MARGINAL |
| 00:00 | 59 | MARGINAL |
| 01:00 · now | 56 | MARGINAL |