Distance
79.3
km · 49.3 mi
Bearing
56.4°
true · rev 236.4°
Terrain
BLOCKED
85.0 dB diffraction
Propagation
72/100
GOOD
Margin
-18.0
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 ≈ 62 m AGL at the midpoint (185 m above the chord, 93 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 24.4 m) clears with margin. The geometric line of sight is obstructed — buried 91 m below terrain at its worst point.
Great circle
32.727, -97.325 → 33.12, -96.615 · 56.4°
Loss budget · 10 GHz
FSPL (free-space)
150.4
dB
Gaseous (O₂ + H₂O)
0.6
dB
Diffraction
85.0
dB
Rain attenuation
0.0
dB
Total path loss
236.0
dB
Gas rate 0.0071 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 14.8 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
-236.0
dB
RX antenna gain
30.0
dBi
RX power
-158.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-18.0
dB
Path weather · HRRR average of 9 samples
Temperature
71.0 °F
21.7 °C
Dewpoint
63.7 °F
17.6 °C
T/Td gap
7.4 °F
4.1 °C
Abs. humidity
14.8
g/m³
Pressure
992.5
mb
PWAT
39.4
mm
BL depth
575.9
m AGL
Refrac. gradient
-79.0
N/km
Propagation factors · 10 GHz
72/100
Rain
100
14%
Humidity
95
13%
PWAT
70
11%
Season
68
11%
T-Td Depression
75
10%
Refractivity
68
10%
Pressure
70
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-10 21:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.7, -97.3
23.1 °C
17.5 °C
995.6 mb
-56.2
722.7
39.0 mm
—
13%
32.8, -97.2
23.6 °C
16.6 °C
995.3 mb
-63.4
667.2
39.7 mm
—
25%
32.8, -97.1
22.8 °C
17.9 °C
995.4 mb
-79.0
577.1
40.0 mm
—
38%
32.9, -97.1
23.3 °C
17.6 °C
997.2 mb
-77.9
606.7
39.1 mm
—
Midpoint
32.9, -97.0
23.3 °C
17.6 °C
997.2 mb
-77.9
606.7
39.1 mm
—
63%
33.0, -96.9
20.7 °C
18.0 °C
995.4 mb
-63.4
597.5
39.5 mm
—
75%
33.0, -96.8
19.7 °C
17.5 °C
993.4 mb
-63.8
482.7
37.7 mm
—
88%
33.1, -96.7
19.5 °C
17.9 °C
992.5 mb
-63.7
466.5
40.1 mm
—
Destination
33.1, -96.6
19.4 °C
17.8 °C
995.0 mb
-62.2
456.2
40.3 mm
—
Midpoint vertical profile
17-hour forecast · this path · 10 GHz
→ steady
Peak 78
at 21:00 UTC
· low 64
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 78 | GOOD |
| 22:00 | 72 | GOOD |
| 23:00 | 69 | GOOD |
| 00:00 | 67 | GOOD |
| 01:00 | 69 | GOOD |
| 02:00 | 64 | MARGINAL |
| 03:00 | 70 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 71 | GOOD |
| 06:00 | 68 | GOOD |
| 07:00 | 68 | GOOD |
| 08:00 | 70 | GOOD |
| 09:00 | 71 | GOOD |
| 10:00 | 73 | GOOD |
| 11:00 | 72 | GOOD |
| 12:00 | 75 | GOOD |
| 13:00 · now | 73 | GOOD |