Distance
67.7
km · 42.1 mi
Bearing
284.6°
true · rev 104.6°
Terrain
BLOCKED
81.6 dB diffraction
Propagation
62/100
MARGINAL
Margin
-23.6
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 ≈ 45 m AGL at the midpoint (135 m above the chord, 68 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 14.5 m) clears with margin. The geometric line of sight is obstructed — buried 60 m below terrain at its worst point.
Great circle
32.968, -95.912 → 33.12, -96.615 · 284.6°
Loss budget · 24 GHz
FSPL (free-space)
156.7
dB
Gaseous (O₂ + H₂O)
3.4
dB
Diffraction
81.6
dB
Rain attenuation
0.0
dB
Total path loss
241.6
dB
Gas rate 0.0495 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 14.7 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
-241.6
dB
RX antenna gain
30.0
dBi
RX power
-163.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-23.6
dB
Path weather · HRRR average of 9 samples
Temperature
71.9 °F
22.2 °C
Dewpoint
63.6 °F
17.6 °C
T/Td gap
8.3 °F
4.6 °C
Abs. humidity
14.7
g/m³
Pressure
987.4
mb
PWAT
21.9
mm
BL depth
239.2
m AGL
Refrac. gradient
-132.3
N/km · super-refractive
Propagation factors · 24 GHz
62/100
Rain
100
14%
Humidity
0
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
60
10%
Refractivity
72
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, -95.9
20.9 °C
17.7 °C
993.3 mb
-87.7
210.8
21.2 mm
—
13%
33.0, -96.0
22.7 °C
18.1 °C
994.5 mb
-109.8
266.4
22.0 mm
—
25%
33.0, -96.1
22.0 °C
17.8 °C
994.0 mb
-113.6
246.9
21.8 mm
—
38%
33.0, -96.2
22.0 °C
17.8 °C
994.0 mb
-113.6
246.9
21.8 mm
—
Midpoint
33.0, -96.3
22.5 °C
17.5 °C
992.4 mb
-132.3
239.3
21.8 mm
—
63%
33.1, -96.4
21.0 °C
17.9 °C
990.6 mb
-119.7
216.4
21.5 mm
—
75%
33.1, -96.4
22.2 °C
17.6 °C
991.0 mb
-120.9
229.6
22.7 mm
—
88%
33.1, -96.5
22.2 °C
17.6 °C
991.0 mb
-120.9
229.6
22.7 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 64
at 08:00 UTC
· low 53
at 00:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 64 | MARGINAL |
| 09:00 | 62 | MARGINAL |
| 10:00 | 62 | MARGINAL |
| 11:00 | 61 | MARGINAL |
| 12:00 | 61 | MARGINAL |
| 13:00 | 61 | MARGINAL |
| 14:00 | 62 | MARGINAL |
| 15:00 | 62 | MARGINAL |
| 16:00 | 57 | MARGINAL |
| 17:00 | 59 | MARGINAL |
| 18:00 | 59 | MARGINAL |
| 19:00 | 63 | MARGINAL |
| 20:00 | 63 | MARGINAL |
| 21:00 | 61 | MARGINAL |
| 22:00 | 58 | MARGINAL |
| 23:00 | 57 | MARGINAL |
| 00:00 | 53 | MARGINAL |
| 01:00 · now | 55 | MARGINAL |