Distance
98.5
km · 61.2 mi
Bearing
106.4°
true · rev 286.4°
Terrain
BLOCKED
91.3 dB diffraction
Propagation
63/100
MARGINAL
Margin
-37.8
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 ≈ 95 m AGL at the midpoint (286 m above the chord, 143 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 17.5 m) clears with margin. The geometric line of sight is obstructed — buried 77 m below terrain at its worst point.
Great circle
33.374, -97.63 → 33.12, -96.615 · 106.4°
Loss budget · 24 GHz
FSPL (free-space)
159.9
dB
Gaseous (O₂ + H₂O)
4.6
dB
Diffraction
91.3
dB
Rain attenuation
0.0
dB
Total path loss
255.8
dB
Gas rate 0.0468 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 13.4 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
-255.8
dB
RX antenna gain
30.0
dBi
RX power
-177.8
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-37.8
dB
Path weather · HRRR average of 9 samples
Temperature
73.0 °F
22.8 °C
Dewpoint
61.0 °F
16.1 °C
T/Td gap
12.0 °F
6.7 °C
Abs. humidity
13.4
g/m³
Pressure
971.2
mb
PWAT
24.7
mm
BL depth
298.4
m AGL
Refrac. gradient
-111.8
N/km · super-refractive
Propagation factors · 24 GHz
63/100
Rain
100
14%
Humidity
3
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
60
10%
Refractivity
72
10%
Pressure
88
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
33.4, -97.6
21.9 °C
16.8 °C
971.2 mb
-77.7
271.9
27.8 mm
—
13%
33.3, -97.5
21.4 °C
17.7 °C
978.1 mb
-84.6
320.1
27.9 mm
—
25%
33.3, -97.4
21.6 °C
18.0 °C
980.7 mb
-111.8
315.8
27.0 mm
—
38%
33.3, -97.2
22.0 °C
17.0 °C
984.4 mb
-96.1
313.6
25.7 mm
—
Midpoint
33.2, -97.1
23.7 °C
14.8 °C
985.8 mb
-70.2
338.3
24.0 mm
—
63%
33.2, -97.0
23.2 °C
14.8 °C
987.3 mb
-64.6
296.8
23.3 mm
—
75%
33.2, -96.9
23.5 °C
15.0 °C
988.3 mb
-69.0
279.1
22.7 mm
—
88%
33.2, -96.7
23.6 °C
14.9 °C
985.3 mb
-68.1
283.7
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 65
at 17:00 UTC
· low 51
at 01:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 63 | MARGINAL |
| 09:00 | 61 | MARGINAL |
| 10:00 | 62 | MARGINAL |
| 11:00 | 59 | MARGINAL |
| 12:00 | 60 | MARGINAL |
| 13:00 | 60 | MARGINAL |
| 14:00 | 60 | MARGINAL |
| 15:00 | 63 | MARGINAL |
| 16:00 | 64 | MARGINAL |
| 17:00 | 65 | GOOD |
| 18:00 | 64 | MARGINAL |
| 19:00 | 65 | GOOD |
| 20:00 | 63 | MARGINAL |
| 21:00 | 59 | MARGINAL |
| 22:00 | 59 | MARGINAL |
| 23:00 | 55 | MARGINAL |
| 00:00 | 54 | MARGINAL |
| 01:00 · now | 51 | MARGINAL |