Distance
221.9
km · 137.9 mi
Bearing
94.0°
true · rev 274.0°
Terrain
BLOCKED
135.0 dB diffraction
Propagation
71/100
GOOD
Margin
-91.4
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 ≈ 483 m AGL at the midpoint (1449 m above the chord, 725 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 26.3 m) clears with margin. The geometric line of sight is obstructed — buried 751 m below terrain at its worst point.
Great circle
33.282, -98.993 → 33.12, -96.615 · 94.0°
Loss budget · 24 GHz
FSPL (free-space)
167.0
dB
Gaseous (O₂ + H₂O)
7.5
dB
Diffraction
135.0
dB
Rain attenuation
0.0
dB
Total path loss
309.4
dB
Gas rate 0.0338 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 6.9 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
-309.4
dB
RX antenna gain
30.0
dBi
RX power
-231.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-91.4
dB
Path weather · HRRR average of 9 samples
Temperature
79.9 °F
26.6 °C
Dewpoint
43.3 °F
6.3 °C
T/Td gap
36.5 °F
20.3 °C
Abs. humidity
6.9
g/m³
Pressure
971.9
mb
PWAT
13.2
mm
BL depth
2280.1
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
71/100
Rain
100
14%
Humidity
60
13%
PWAT
80
11%
Season
47
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
88
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
33.3, -99.0
26.6 °C
6.4 °C
974.9 mb
2250.2
13.4 mm
—
13%
33.3, -98.7
26.6 °C
5.5 °C
974.2 mb
2233.7
12.7 mm
—
25%
33.2, -98.4
26.6 °C
4.7 °C
971.9 mb
2214.0
11.9 mm
—
38%
33.2, -98.1
26.9 °C
5.5 °C
981.1 mb
2268.8
12.6 mm
—
Midpoint
33.2, -97.8
26.9 °C
6.7 °C
986.3 mb
2366.4
14.1 mm
—
63%
33.2, -97.5
25.2 °C
8.2 °C
983.8 mb
2295.4
13.2 mm
—
75%
33.2, -97.2
24.9 °C
9.5 °C
990.9 mb
2182.0
12.8 mm
—
88%
33.1, -96.9
27.3 °C
6.2 °C
995.3 mb
2332.9
14.2 mm
—
Destination
33.1, -96.6
28.2 °C
3.9 °C
994.1 mb
2377.9
13.9 mm
—
Midpoint vertical profile
17-hour forecast · this path · 24 GHz
→ steady
Peak 76
at 03:00 UTC
· low 64
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 74 | GOOD |
| 21:00 | 74 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 73 | GOOD |
| 00:00 | 70 | GOOD |
| 01:00 | 69 | GOOD |
| 02:00 | 69 | GOOD |
| 03:00 | 76 | GOOD |
| 04:00 | 74 | GOOD |
| 05:00 | 73 | GOOD |
| 06:00 | 73 | GOOD |
| 07:00 | 72 | GOOD |
| 08:00 | 71 | GOOD |
| 09:00 | 70 | GOOD |
| 10:00 | 71 | GOOD |
| 11:00 | 67 | GOOD |
| 12:00 · now | 64 | MARGINAL |