Distance
39.4
km · 24.5 mi
Bearing
178.4°
true · rev 358.4°
Terrain
BLOCKED
20.2 dB diffraction
Propagation
71/100
GOOD
Margin
+44.6
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 ≈ 15 m AGL at the midpoint (46 m above the chord, 23 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 11.1 m) clears with margin. The geometric line of sight is obstructed — buried 3 m below terrain at its worst point.
Great circle
33.474, -96.627 → 33.12, -96.615 · 178.4°
Loss budget · 24 GHz
FSPL (free-space)
151.9
dB
Gaseous (O₂ + H₂O)
1.3
dB
Diffraction
20.2
dB
Rain attenuation
0.0
dB
Total path loss
173.4
dB
Gas rate 0.0330 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 6.4 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
-173.4
dB
RX antenna gain
30.0
dBi
RX power
-95.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
44.6
dB
Path weather · HRRR average of 9 samples
Temperature
82.1 °F
27.8 °C
Dewpoint
41.5 °F
5.3 °C
T/Td gap
40.6 °F
22.5 °C
Abs. humidity
6.4
g/m³
Pressure
987.4
mb
PWAT
14.8
mm
BL depth
2335.8
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
71/100
Rain
100
14%
Humidity
66
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
33.5, -96.6
27.3 °C
6.0 °C
987.4 mb
2252.5
15.0 mm
—
13%
33.4, -96.6
27.9 °C
4.9 °C
993.0 mb
2275.5
14.2 mm
—
25%
33.4, -96.6
27.9 °C
4.9 °C
993.0 mb
2275.5
14.2 mm
—
38%
33.3, -96.6
27.9 °C
4.9 °C
993.0 mb
2275.5
14.2 mm
—
Midpoint
33.3, -96.6
27.6 °C
4.7 °C
994.3 mb
2315.0
13.5 mm
—
63%
33.3, -96.6
27.6 °C
4.7 °C
994.3 mb
2315.0
13.5 mm
—
75%
33.2, -96.6
27.6 °C
4.7 °C
994.3 mb
2315.0
13.5 mm
—
88%
33.2, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 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 74
at 20:00 UTC
· low 63
at 13:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 74 | GOOD |
| 21:00 | 72 | GOOD |
| 22:00 | 72 | GOOD |
| 23:00 | 71 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 71 | GOOD |
| 02:00 | 69 | GOOD |
| 03:00 | 74 | GOOD |
| 04:00 | 73 | GOOD |
| 05:00 | 74 | GOOD |
| 06:00 | 74 | GOOD |
| 07:00 | 74 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 73 | GOOD |
| 10:00 | 74 | GOOD |
| 11:00 | 72 | GOOD |
| 12:00 | 64 | MARGINAL |
| 13:00 · now | 63 | MARGINAL |