Distance
131.1
km · 81.5 mi
Bearing
137.0°
true · rev 317.0°
Terrain
BLOCKED
115.5 dB diffraction
Propagation
69/100
GOOD
Margin
-64.4
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 ≈ 169 m AGL at the midpoint (506 m above the chord, 253 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 20.2 m) clears with margin. The geometric line of sight is obstructed — buried 263 m below terrain at its worst point.
Great circle
33.987, -97.575 → 33.12, -96.615 · 137.0°
Loss budget · 24 GHz
FSPL (free-space)
162.4
dB
Gaseous (O₂ + H₂O)
4.5
dB
Diffraction
115.5
dB
Rain attenuation
0.0
dB
Total path loss
282.4
dB
Gas rate 0.0346 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 7.3 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
-282.4
dB
RX antenna gain
30.0
dBi
RX power
-204.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-64.4
dB
Path weather · HRRR average of 9 samples
Temperature
81.2 °F
27.3 °C
Dewpoint
44.8 °F
7.1 °C
T/Td gap
36.4 °F
20.2 °C
Abs. humidity
7.3
g/m³
Pressure
980.7
mb
PWAT
15.1
mm
BL depth
2276.6
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
69/100
Rain
100
14%
Humidity
55
13%
PWAT
80
11%
Season
47
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
82
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
34.0, -97.6
27.6 °C
7.0 °C
986.5 mb
2324.1
14.6 mm
—
13%
33.9, -97.5
27.2 °C
7.0 °C
984.8 mb
2253.3
15.2 mm
—
25%
33.8, -97.3
26.3 °C
9.1 °C
980.7 mb
2190.1
15.5 mm
—
38%
33.7, -97.2
26.6 °C
8.1 °C
987.2 mb
2091.7
14.5 mm
—
Midpoint
33.6, -97.1
27.1 °C
7.9 °C
992.6 mb
2235.0
14.7 mm
—
63%
33.4, -97.0
27.3 °C
7.0 °C
991.6 mb
2251.0
14.2 mm
—
75%
33.3, -96.9
27.6 °C
5.9 °C
993.6 mb
2289.9
14.3 mm
—
88%
33.2, -96.7
28.1 °C
5.7 °C
991.9 mb
2354.5
15.8 mm
—
Destination
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
Midpoint vertical profile
18-hour forecast · this path · 24 GHz
→ steady
Peak 73
at 07:00 UTC
· low 62
at 13:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 70 | GOOD |
| 21:00 | 71 | GOOD |
| 22:00 | 71 | GOOD |
| 23:00 | 71 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 72 | GOOD |
| 03:00 | 71 | GOOD |
| 04:00 | 72 | GOOD |
| 05:00 | 71 | GOOD |
| 06:00 | 71 | GOOD |
| 07:00 | 73 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 71 | GOOD |
| 10:00 | 72 | GOOD |
| 11:00 | 68 | GOOD |
| 12:00 | 65 | GOOD |
| 13:00 · now | 62 | MARGINAL |