Distance
146.0
km · 90.7 mi
Bearing
143.1°
true · rev 323.1°
Terrain
BLOCKED
119.0 dB diffraction
Propagation
62/100
MARGINAL
Margin
-71.2
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 ≈ 209 m AGL at the midpoint (627 m above the chord, 314 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 21.4 m) clears with margin. The geometric line of sight is obstructed — buried 341 m below terrain at its worst point.
Great circle
34.173, -97.557 → 33.12, -96.615 · 143.1°
Loss budget · 24 GHz
FSPL (free-space)
163.3
dB
Gaseous (O₂ + H₂O)
6.9
dB
Diffraction
119.0
dB
Rain attenuation
0.0
dB
Total path loss
289.2
dB
Gas rate 0.0471 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 13.5 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
-289.2
dB
RX antenna gain
30.0
dBi
RX power
-211.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-71.2
dB
Path weather · HRRR average of 9 samples
Temperature
74.3 °F
23.5 °C
Dewpoint
61.3 °F
16.3 °C
T/Td gap
13.0 °F
7.2 °C
Abs. humidity
13.5
g/m³
Pressure
972.9
mb
PWAT
26.8
mm
BL depth
325.5
m AGL
Refrac. gradient
-91.8
N/km
Propagation factors · 24 GHz
62/100
Rain
100
14%
Humidity
3
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
60
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
34.2, -97.6
23.2 °C
16.6 °C
972.9 mb
-82.7
323.6
29.4 mm
—
13%
34.0, -97.4
23.5 °C
16.4 °C
978.5 mb
-73.5
340.3
30.3 mm
—
25%
33.9, -97.3
23.7 °C
17.0 °C
981.2 mb
-77.6
328.6
30.5 mm
—
38%
33.8, -97.2
23.4 °C
17.0 °C
981.3 mb
-91.8
349.3
29.7 mm
—
Midpoint
33.6, -97.1
22.5 °C
17.3 °C
981.9 mb
-80.8
348.1
27.9 mm
—
63%
33.5, -97.0
23.2 °C
16.3 °C
984.6 mb
-83.7
351.7
25.5 mm
—
75%
33.4, -96.9
23.7 °C
15.3 °C
986.5 mb
-81.8
339.3
23.5 mm
—
88%
33.3, -96.7
24.1 °C
14.8 °C
985.1 mb
-64.2
282.1
21.9 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 63
at 10:00 UTC
· low 52
at 23:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 62 | MARGINAL |
| 09:00 | 60 | MARGINAL |
| 10:00 | 63 | MARGINAL |
| 11:00 | 59 | MARGINAL |
| 12:00 | 60 | MARGINAL |
| 13:00 | 59 | MARGINAL |
| 14:00 | 57 | MARGINAL |
| 15:00 | 58 | MARGINAL |
| 16:00 | 54 | MARGINAL |
| 17:00 | 60 | MARGINAL |
| 18:00 | 60 | MARGINAL |
| 19:00 | 62 | MARGINAL |
| 20:00 | 62 | MARGINAL |
| 21:00 | 58 | MARGINAL |
| 22:00 | 55 | MARGINAL |
| 23:00 | 52 | MARGINAL |
| 00:00 | 52 | MARGINAL |
| 01:00 · now | 53 | MARGINAL |