Distance
124.9
km · 77.6 mi
Bearing
102.4°
true · rev 282.4°
Terrain
BLOCKED
112.3 dB diffraction
Propagation
70/100
GOOD
Margin
-60.6
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 ≈ 153 m AGL at the midpoint (459 m above the chord, 230 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 19.8 m) clears with margin. The geometric line of sight is obstructed — buried 218 m below terrain at its worst point.
Great circle
33.437, -97.763 → 33.189, -96.452 · 102.4°
Loss budget · 24 GHz
FSPL (free-space)
162.0
dB
Gaseous (O₂ + H₂O)
4.3
dB
Diffraction
112.3
dB
Rain attenuation
0.0
dB
Total path loss
278.6
dB
Gas rate 0.0343 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 7.1 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
-278.6
dB
RX antenna gain
30.0
dBi
RX power
-200.6
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-60.6
dB
Path weather · HRRR average of 9 samples
Temperature
80.0 °F
26.7 °C
Dewpoint
44.2 °F
6.8 °C
T/Td gap
35.9 °F
19.9 °C
Abs. humidity
7.1
g/m³
Pressure
978.5
mb
PWAT
14.3
mm
BL depth
2248.7
m AGL
Refrac. gradient
0
N/km
Propagation factors · 24 GHz
70/100
Rain
100
14%
Humidity
57
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, -97.8
26.9 °C
6.0 °C
985.3 mb
2296.8
13.3 mm
—
13%
33.4, -97.6
24.7 °C
8.2 °C
978.5 mb
2210.2
14.3 mm
—
25%
33.4, -97.4
24.7 °C
9.8 °C
983.6 mb
2071.5
15.0 mm
—
38%
33.3, -97.3
26.4 °C
8.3 °C
989.9 mb
2184.3
14.2 mm
—
Midpoint
33.3, -97.1
27.3 °C
7.0 °C
993.0 mb
2235.5
14.1 mm
—
63%
33.3, -96.9
27.0 °C
6.4 °C
994.5 mb
2280.0
15.1 mm
—
75%
33.3, -96.8
28.1 °C
5.7 °C
991.9 mb
2354.5
15.8 mm
—
88%
33.2, -96.6
27.6 °C
4.7 °C
994.3 mb
2315.0
13.5 mm
—
Destination
33.2, -96.5
27.6 °C
4.8 °C
995.4 mb
2290.7
13.7 mm
—
Midpoint vertical profile
18-hour forecast · this path · 24 GHz
→ steady
Peak 74
at 07:00 UTC
· low 63
at 13:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 71 | GOOD |
| 21:00 | 70 | GOOD |
| 22:00 | 72 | GOOD |
| 23:00 | 72 | GOOD |
| 00:00 | 72 | GOOD |
| 01:00 | 71 | GOOD |
| 02:00 | 69 | GOOD |
| 03:00 | 70 | GOOD |
| 04:00 | 71 | GOOD |
| 05:00 | 71 | GOOD |
| 06:00 | 72 | GOOD |
| 07:00 | 74 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 72 | GOOD |
| 10:00 | 73 | GOOD |
| 11:00 | 70 | GOOD |
| 12:00 | 64 | MARGINAL |
| 13:00 · now | 63 | MARGINAL |