Distance
238.6
km · 148.3 mi
Bearing
88.1°
true · rev 268.1°
Terrain
BLOCKED
137.2 dB diffraction
Propagation
63/100
MARGINAL
Margin
-97.4
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 ≈ 558 m AGL at the midpoint (1675 m above the chord, 838 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 27.3 m) clears with margin. The geometric line of sight is obstructed — buried 840 m below terrain at its worst point.
Great circle
33.075, -99.176 → 33.12, -96.615 · 88.1°
Loss budget · 24 GHz
FSPL (free-space)
167.6
dB
Gaseous (O₂ + H₂O)
10.6
dB
Diffraction
137.2
dB
Rain attenuation
0.0
dB
Total path loss
315.4
dB
Gas rate 0.0445 dB/km · H₂O 0.0020 dB/km/g · O₂ 0.0200 dB/km
Path abs. humidity avg 12.2 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
-315.4
dB
RX antenna gain
30.0
dBi
RX power
-237.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-97.4
dB
Path weather · HRRR average of 9 samples
Temperature
74.6 °F
23.7 °C
Dewpoint
58.5 °F
14.7 °C
T/Td gap
16.1 °F
8.9 °C
Abs. humidity
12.2
g/m³
Pressure
962.5
mb
PWAT
26.8
mm
BL depth
294.4
m AGL
Refrac. gradient
-91.5
N/km
Propagation factors · 24 GHz
63/100
Rain
100
14%
Humidity
7
13%
PWAT
60
11%
Season
47
11%
T-Td Depression
80
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
33.1, -99.2
25.4 °C
13.8 °C
962.5 mb
-82.5
295.3
28.9 mm
—
13%
33.1, -98.9
25.4 °C
13.3 °C
966.3 mb
-56.4
316.3
30.2 mm
—
25%
33.1, -98.5
24.0 °C
12.5 °C
966.4 mb
-70.1
316.8
27.2 mm
—
38%
33.1, -98.2
22.7 °C
13.3 °C
964.6 mb
-67.7
320.4
27.9 mm
—
Midpoint
33.1, -97.9
23.7 °C
15.0 °C
977.3 mb
-82.9
259.3
28.9 mm
—
63%
33.1, -97.6
22.8 °C
16.8 °C
982.3 mb
-79.5
336.4
28.8 mm
—
75%
33.1, -97.3
21.3 °C
16.7 °C
983.4 mb
-85.7
259.1
24.9 mm
—
88%
33.1, -96.9
23.5 °C
15.0 °C
988.3 mb
-69.0
279.1
22.7 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 53
at 23:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 62 | MARGINAL |
| 09:00 | 61 | MARGINAL |
| 10:00 | 63 | MARGINAL |
| 11:00 | 63 | MARGINAL |
| 12:00 | 63 | MARGINAL |
| 13:00 | 58 | MARGINAL |
| 14:00 | 58 | MARGINAL |
| 15:00 | 63 | MARGINAL |
| 16:00 | 58 | MARGINAL |
| 17:00 | 62 | MARGINAL |
| 18:00 | 60 | MARGINAL |
| 19:00 | 59 | MARGINAL |
| 20:00 | 58 | MARGINAL |
| 21:00 | 55 | MARGINAL |
| 22:00 | 55 | MARGINAL |
| 23:00 | 53 | MARGINAL |
| 00:00 | 55 | MARGINAL |
| 01:00 · now | 57 | MARGINAL |