Distance
39.0
km · 24.2 mi
Bearing
65.6°
true · rev 245.6°
Terrain
BLOCKED
86.6 dB diffraction
Propagation
68/100
GOOD
Margin
-21.8
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 (45 m above the chord, 22 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 11.0 m) clears with margin. The geometric line of sight is obstructed — buried 39 m below terrain at its worst point.
Great circle
33.045, -96.834 → 33.189, -96.452 · 65.6°
Loss budget · 24 GHz
FSPL (free-space)
151.9
dB
Gaseous (O₂ + H₂O)
1.4
dB
Diffraction
86.6
dB
Rain attenuation
0.0
dB
Total path loss
239.8
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
-239.8
dB
RX antenna gain
30.0
dBi
RX power
-161.8
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-21.8
dB
Path weather · HRRR average of 9 samples
Temperature
81.2 °F
27.3 °C
Dewpoint
44.9 °F
7.2 °C
T/Td gap
36.3 °F
20.1 °C
Abs. humidity
7.3
g/m³
Pressure
992.1
mb
PWAT
16.6
mm
BL depth
2337.6
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
68/100
Rain
100
14%
Humidity
55
13%
PWAT
80
11%
Season
47
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
70
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
33.0, -96.8
27.1 °C
7.5 °C
995.0 mb
2330.0
16.8 mm
—
13%
33.1, -96.8
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 mm
—
25%
33.1, -96.7
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 mm
—
38%
33.1, -96.7
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 mm
—
Midpoint
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
63%
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
75%
33.2, -96.5
26.7 °C
9.6 °C
997.4 mb
2275.3
17.7 mm
—
88%
33.2, -96.5
26.7 °C
9.6 °C
997.4 mb
2275.3
17.7 mm
—
Destination
33.2, -96.5
27.6 °C
4.8 °C
995.4 mb
2290.7
13.7 mm
—
Midpoint vertical profile
18-hour forecast · this path · 24 GHz
→ steady
Peak 75
at 05:00 UTC
· low 63
at 13:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 71 | GOOD |
| 21:00 | 69 | GOOD |
| 22:00 | 73 | GOOD |
| 23:00 | 72 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 | 71 | GOOD |
| 02:00 | 69 | GOOD |
| 03:00 | 72 | GOOD |
| 04:00 | 74 | GOOD |
| 05:00 | 75 | GOOD |
| 06:00 | 73 | GOOD |
| 07:00 | 73 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 72 | GOOD |
| 10:00 | 73 | GOOD |
| 11:00 | 71 | GOOD |
| 12:00 | 64 | MARGINAL |
| 13:00 · now | 63 | MARGINAL |