Distance
257.7
km · 160.1 mi
Bearing
98.2°
true · rev 278.2°
Terrain
BLOCKED
140.4 dB diffraction
Propagation
71/100
GOOD
Margin
-99.2
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 ≈ 651 m AGL at the midpoint (1954 m above the chord, 977 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 28.4 m) clears with margin. The geometric line of sight is obstructed — buried 1000 m below terrain at its worst point.
Great circle
33.55, -99.193 → 33.189, -96.452 · 98.2°
Loss budget · 24 GHz
FSPL (free-space)
168.3
dB
Gaseous (O₂ + H₂O)
8.5
dB
Diffraction
140.4
dB
Rain attenuation
0.0
dB
Total path loss
317.2
dB
Gas rate 0.0331 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 6.5 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
-317.2
dB
RX antenna gain
30.0
dBi
RX power
-239.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-99.2
dB
Path weather · HRRR average of 9 samples
Temperature
80.5 °F
27.0 °C
Dewpoint
42.0 °F
5.5 °C
T/Td gap
38.6 °F
21.4 °C
Abs. humidity
6.5
g/m³
Pressure
970.0
mb
PWAT
12.8
mm
BL depth
2281.3
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
71/100
Rain
100
14%
Humidity
64
13%
PWAT
80
11%
Season
47
11%
T-Td Depression
96
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
33.6, -99.2
27.0 °C
5.0 °C
970.0 mb
2322.1
12.9 mm
—
13%
33.5, -98.9
26.8 °C
5.7 °C
972.8 mb
2266.1
12.8 mm
—
25%
33.5, -98.5
27.8 °C
4.5 °C
975.5 mb
2275.3
12.8 mm
—
38%
33.4, -98.2
27.1 °C
3.6 °C
980.2 mb
2244.0
10.3 mm
—
Midpoint
33.4, -97.8
26.5 °C
5.2 °C
979.8 mb
2261.7
11.8 mm
—
63%
33.3, -97.5
24.9 °C
9.3 °C
985.6 mb
2215.8
14.1 mm
—
75%
33.3, -97.1
26.7 °C
7.8 °C
993.3 mb
2228.5
13.2 mm
—
88%
33.2, -96.8
28.1 °C
4.7 °C
992.1 mb
2338.5
14.1 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 · 24 GHz
→ steady
Peak 77
at 03:00 UTC
· low 66
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 76 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 75 | GOOD |
| 00:00 | 74 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 70 | GOOD |
| 03:00 | 77 | GOOD |
| 04:00 | 75 | GOOD |
| 05:00 | 74 | GOOD |
| 06:00 | 74 | GOOD |
| 07:00 | 74 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 72 | GOOD |
| 10:00 | 72 | GOOD |
| 11:00 | 68 | GOOD |
| 12:00 · now | 66 | GOOD |