Distance
233.0
km · 144.8 mi
Bearing
99.7°
true · rev 279.7°
Terrain
BLOCKED
136.3 dB diffraction
Propagation
63/100
MARGINAL
Margin
-95.8
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 ≈ 532 m AGL at the midpoint (1597 m above the chord, 799 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 27.0 m) clears with margin. The geometric line of sight is obstructed — buried 806 m below terrain at its worst point.
Great circle
33.498, -99.081 → 33.12, -96.615 · 99.7°
Loss budget · 24 GHz
FSPL (free-space)
167.4
dB
Gaseous (O₂ + H₂O)
10.1
dB
Diffraction
136.3
dB
Rain attenuation
0.0
dB
Total path loss
313.8
dB
Gas rate 0.0435 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 11.7 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
-313.8
dB
RX antenna gain
30.0
dBi
RX power
-235.8
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-95.8
dB
Path weather · HRRR average of 9 samples
Temperature
74.6 °F
23.7 °C
Dewpoint
57.4 °F
14.1 °C
T/Td gap
17.2 °F
9.6 °C
Abs. humidity
11.7
g/m³
Pressure
961.6
mb
PWAT
25.6
mm
BL depth
303.8
m AGL
Refrac. gradient
-96.1
N/km
Propagation factors · 24 GHz
63/100
Rain
100
14%
Humidity
8
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
80
10%
Refractivity
62
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
33.5, -99.1
26.6 °C
8.5 °C
961.6 mb
-38.2
283.4
25.2 mm
—
13%
33.5, -98.8
25.6 °C
10.0 °C
967.5 mb
-71.7
276.0
23.8 mm
—
25%
33.4, -98.5
24.2 °C
12.6 °C
967.8 mb
-77.6
347.8
24.9 mm
—
38%
33.4, -98.2
21.9 °C
14.1 °C
972.7 mb
-61.8
315.4
29.0 mm
—
Midpoint
33.3, -97.8
22.9 °C
16.6 °C
978.8 mb
-83.6
351.3
30.5 mm
—
63%
33.3, -97.5
22.4 °C
17.0 °C
977.7 mb
-86.6
301.3
27.0 mm
—
75%
33.2, -97.2
22.0 °C
17.0 °C
984.4 mb
-96.1
313.6
25.7 mm
—
88%
33.2, -96.9
23.5 °C
15.0 °C
988.3 mb
-69.0
279.1
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 66
at 17:00 UTC
· low 49
at 00:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 58 | MARGINAL |
| 09:00 | 61 | MARGINAL |
| 10:00 | 60 | MARGINAL |
| 11:00 | 62 | MARGINAL |
| 12:00 | 62 | MARGINAL |
| 13:00 | 62 | MARGINAL |
| 14:00 | 62 | MARGINAL |
| 15:00 | 60 | MARGINAL |
| 16:00 | 59 | MARGINAL |
| 17:00 | 66 | GOOD |
| 18:00 | 65 | GOOD |
| 19:00 | 59 | MARGINAL |
| 20:00 | 56 | MARGINAL |
| 21:00 | 56 | MARGINAL |
| 22:00 | 54 | MARGINAL |
| 23:00 | 55 | MARGINAL |
| 00:00 | 49 | POOR |
| 01:00 · now | 54 | MARGINAL |