Distance
22.0
km · 13.7 mi
Bearing
67.5°
true · rev 247.5°
Terrain
BLOCKED
77.7 dB diffraction
Propagation
62/100
MARGINAL
Margin
-7.6
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 ≈ 5 m AGL at the midpoint (14 m above the chord, 7 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 8.3 m) clears with margin. The geometric line of sight is obstructed — buried 26 m below terrain at its worst point.
Great circle
33.045, -96.834 → 33.12, -96.615 · 67.5°
Loss budget · 24 GHz
FSPL (free-space)
146.9
dB
Gaseous (O₂ + H₂O)
1.0
dB
Diffraction
77.7
dB
Rain attenuation
0.0
dB
Total path loss
225.6
dB
Gas rate 0.0455 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 12.8 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
-225.6
dB
RX antenna gain
30.0
dBi
RX power
-147.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-7.6
dB
Path weather · HRRR average of 9 samples
Temperature
74.8 °F
23.8 °C
Dewpoint
59.8 °F
15.4 °C
T/Td gap
15.1 °F
8.4 °C
Abs. humidity
12.8
g/m³
Pressure
985.3
mb
PWAT
22.3
mm
BL depth
279.7
m AGL
Refrac. gradient
-91.5
N/km
Propagation factors · 24 GHz
62/100
Rain
100
14%
Humidity
5
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
80
10%
Refractivity
62
10%
Pressure
82
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
33.0, -96.8
23.0 °C
15.6 °C
988.3 mb
-85.3
272.4
23.2 mm
—
13%
33.1, -96.8
24.5 °C
15.6 °C
986.8 mb
-81.7
310.9
22.9 mm
—
25%
33.1, -96.8
23.6 °C
14.9 °C
985.3 mb
-68.1
283.7
22.0 mm
—
38%
33.1, -96.8
23.6 °C
14.9 °C
985.3 mb
-68.1
283.7
22.0 mm
—
Midpoint
33.1, -96.7
23.6 °C
14.9 °C
985.3 mb
-68.1
283.7
22.0 mm
—
63%
33.1, -96.7
23.6 °C
14.9 °C
985.3 mb
-68.1
283.7
22.0 mm
—
75%
33.1, -96.7
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 mm
—
88%
33.1, -96.6
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 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 66
at 18:00 UTC
· low 55
at 00:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 65 | GOOD |
| 09:00 | 61 | MARGINAL |
| 10:00 | 63 | MARGINAL |
| 11:00 | 62 | MARGINAL |
| 12:00 | 64 | MARGINAL |
| 13:00 | 63 | MARGINAL |
| 14:00 | 63 | MARGINAL |
| 15:00 | 63 | MARGINAL |
| 16:00 | 62 | MARGINAL |
| 17:00 | 60 | MARGINAL |
| 18:00 | 66 | GOOD |
| 19:00 | 64 | MARGINAL |
| 20:00 | 65 | GOOD |
| 21:00 | 63 | MARGINAL |
| 22:00 | 58 | MARGINAL |
| 23:00 | 58 | MARGINAL |
| 00:00 | 55 | MARGINAL |
| 01:00 · now | 57 | MARGINAL |