Distance
212.5
km · 132.0 mi
Bearing
99.2°
true · rev 279.2°
Terrain
BLOCKED
132.1 dB diffraction
Propagation
71/100
GOOD
Margin
-87.7
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 ≈ 443 m AGL at the midpoint (1328 m above the chord, 664 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 25.8 m) clears with margin. The geometric line of sight is obstructed — buried 664 m below terrain at its worst point.
Great circle
33.445, -98.868 → 33.12, -96.615 · 99.2°
Loss budget · 24 GHz
FSPL (free-space)
166.6
dB
Gaseous (O₂ + H₂O)
7.1
dB
Diffraction
132.1
dB
Rain attenuation
0.0
dB
Total path loss
305.7
dB
Gas rate 0.0333 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 6.6 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
-305.7
dB
RX antenna gain
30.0
dBi
RX power
-227.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-87.7
dB
Path weather · HRRR average of 9 samples
Temperature
80.7 °F
27.1 °C
Dewpoint
42.3 °F
5.7 °C
T/Td gap
38.4 °F
21.3 °C
Abs. humidity
6.6
g/m³
Pressure
972.8
mb
PWAT
13.1
mm
BL depth
2292.3
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
71/100
Rain
100
14%
Humidity
63
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
33.4, -98.9
26.8 °C
5.7 °C
972.8 mb
2266.1
12.8 mm
—
13%
33.4, -98.6
27.3 °C
4.2 °C
972.8 mb
2244.0
12.3 mm
—
25%
33.4, -98.3
27.4 °C
5.3 °C
980.1 mb
2299.4
12.8 mm
—
38%
33.3, -98.0
26.9 °C
4.4 °C
979.1 mb
2255.8
11.1 mm
—
Midpoint
33.3, -97.7
26.9 °C
6.7 °C
986.3 mb
2366.4
14.1 mm
—
63%
33.2, -97.5
26.0 °C
7.5 °C
985.4 mb
2259.3
13.2 mm
—
75%
33.2, -97.2
26.7 °C
7.8 °C
993.3 mb
2228.5
13.2 mm
—
88%
33.2, -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 |