Distance
37.4
km · 23.3 mi
Bearing
263.2°
true · rev 83.2°
Terrain
BLOCKED
73.1 dB diffraction
Propagation
51/100
MARGINAL
Margin
-8.5
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 ≈ 14 m AGL at the midpoint (41 m above the chord, 21 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 10.8 m) clears with margin. The geometric line of sight is obstructed — buried 28 m below terrain at its worst point.
Great circle
33.16, -96.216 → 33.12, -96.615 · 263.2°
Loss budget · 24 GHz
FSPL (free-space)
151.5
dB
Gaseous (O₂ + H₂O)
1.9
dB
Diffraction
73.1
dB
Rain attenuation
0.0
dB
Total path loss
226.5
dB
Gas rate 0.0500 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 15.0 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
-226.5
dB
RX antenna gain
30.0
dBi
RX power
-148.5
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-8.5
dB
Path weather · HRRR average of 9 samples
Temperature
66.0 °F
18.9 °C
Dewpoint
63.8 °F
17.7 °C
T/Td gap
2.2 °F
1.2 °C
Abs. humidity
15.0
g/m³
Pressure
995.0
mb
PWAT
39.9
mm
BL depth
432.4
m AGL
Refrac. gradient
-69.8
N/km
Propagation factors · 24 GHz
51/100
Rain
100
14%
Humidity
0
13%
PWAT
35
11%
Season
47
11%
T-Td Depression
18
10%
Refractivity
55
10%
Pressure
70
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-10 21:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
33.2, -96.2
18.4 °C
17.4 °C
996.8 mb
-69.8
348.7
39.6 mm
—
13%
33.2, -96.3
18.4 °C
17.4 °C
996.8 mb
-69.8
348.7
39.6 mm
—
25%
33.2, -96.3
18.9 °C
17.7 °C
997.6 mb
-63.8
472.8
39.3 mm
—
38%
33.1, -96.4
18.9 °C
17.7 °C
997.6 mb
-63.8
472.8
39.3 mm
—
Midpoint
33.1, -96.4
18.9 °C
17.7 °C
997.6 mb
-63.8
472.8
39.3 mm
—
63%
33.1, -96.5
18.9 °C
17.8 °C
998.4 mb
-65.0
431.7
40.8 mm
—
75%
33.1, -96.5
18.9 °C
17.8 °C
998.4 mb
-65.0
431.7
40.8 mm
—
88%
33.1, -96.6
19.4 °C
17.8 °C
995.0 mb
-62.2
456.2
40.3 mm
—
Destination
33.1, -96.6
19.4 °C
17.8 °C
995.0 mb
-62.2
456.2
40.3 mm
—
Midpoint vertical profile
17-hour forecast · this path · 24 GHz
→ steady
Peak 59
at 12:00 UTC
· low 35
at 21:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 35 | POOR |
| 22:00 | 47 | POOR |
| 23:00 | 49 | POOR |
| 00:00 | 47 | POOR |
| 01:00 | 47 | POOR |
| 02:00 | 47 | POOR |
| 03:00 | 37 | POOR |
| 04:00 | 54 | MARGINAL |
| 05:00 | 54 | MARGINAL |
| 06:00 | 55 | MARGINAL |
| 07:00 | 53 | MARGINAL |
| 08:00 | 53 | MARGINAL |
| 09:00 | 53 | MARGINAL |
| 10:00 | 55 | MARGINAL |
| 11:00 | 55 | MARGINAL |
| 12:00 | 59 | MARGINAL |
| 13:00 · now | 59 | MARGINAL |