Distance
173.2
km · 107.6 mi
Bearing
120.4°
true · rev 300.4°
Terrain
BLOCKED
127.9 dB diffraction
Propagation
70/100
GOOD
Margin
-80.6
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 ≈ 294 m AGL at the midpoint (883 m above the chord, 441 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 23.3 m) clears with margin. The geometric line of sight is obstructed — buried 496 m below terrain at its worst point.
Great circle
33.919, -98.219 → 33.12, -96.615 · 120.4°
Loss budget · 24 GHz
FSPL (free-space)
164.8
dB
Gaseous (O₂ + H₂O)
5.9
dB
Diffraction
127.9
dB
Rain attenuation
0.0
dB
Total path loss
298.6
dB
Gas rate 0.0340 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 7.0 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
-298.6
dB
RX antenna gain
30.0
dBi
RX power
-220.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-80.6
dB
Path weather · HRRR average of 9 samples
Temperature
80.3 °F
26.8 °C
Dewpoint
43.7 °F
6.5 °C
T/Td gap
36.5 °F
20.3 °C
Abs. humidity
7.0
g/m³
Pressure
974.1
mb
PWAT
13.1
mm
BL depth
2259.3
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
70/100
Rain
100
14%
Humidity
58
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
33.9, -98.2
27.4 °C
4.9 °C
983.1 mb
2342.2
11.8 mm
—
13%
33.8, -98.0
27.1 °C
6.2 °C
985.7 mb
2289.0
12.2 mm
—
25%
33.7, -97.8
27.1 °C
4.9 °C
984.4 mb
2303.8
12.1 mm
—
38%
33.6, -97.6
24.8 °C
8.2 °C
974.1 mb
2202.8
13.8 mm
—
Midpoint
33.5, -97.4
25.7 °C
8.2 °C
983.6 mb
2034.5
12.4 mm
—
63%
33.4, -97.2
26.4 °C
8.5 °C
989.9 mb
2168.3
13.6 mm
—
75%
33.3, -97.0
26.8 °C
7.4 °C
992.3 mb
2228.2
13.2 mm
—
88%
33.2, -96.8
27.8 °C
6.5 °C
995.5 mb
2387.5
15.4 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 75
at 03:00 UTC
· low 66
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 71 | GOOD |
| 21:00 | 73 | GOOD |
| 22:00 | 73 | GOOD |
| 23:00 | 72 | GOOD |
| 00:00 | 69 | GOOD |
| 01:00 | 70 | GOOD |
| 02:00 | 71 | GOOD |
| 03:00 | 75 | GOOD |
| 04:00 | 72 | GOOD |
| 05:00 | 74 | GOOD |
| 06:00 | 73 | GOOD |
| 07:00 | 73 | GOOD |
| 08:00 | 71 | GOOD |
| 09:00 | 71 | GOOD |
| 10:00 | 73 | GOOD |
| 11:00 | 68 | GOOD |
| 12:00 · now | 66 | GOOD |