Distance
82.3
km · 51.1 mi
Bearing
229.8°
true · rev 49.8°
Terrain
BLOCKED
87.2 dB diffraction
Propagation
69/100
GOOD
Margin
-20.5
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 ≈ 66 m AGL at the midpoint (199 m above the chord, 100 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 24.8 m) clears with margin. The geometric line of sight is obstructed — buried 120 m below terrain at its worst point.
Great circle
33.6, -95.94 → 33.12, -96.615 · 229.8°
Loss budget · 10 GHz
FSPL (free-space)
150.7
dB
Gaseous (O₂ + H₂O)
0.6
dB
Diffraction
87.2
dB
Rain attenuation
0.0
dB
Total path loss
238.5
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 15.0 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
-238.5
dB
RX antenna gain
30.0
dBi
RX power
-160.5
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-20.5
dB
Path weather · HRRR average of 9 samples
Temperature
67.0 °F
19.4 °C
Dewpoint
63.9 °F
17.7 °C
T/Td gap
3.0 °F
1.7 °C
Abs. humidity
15.0
g/m³
Pressure
992.6
mb
PWAT
40.8
mm
BL depth
542.2
m AGL
Refrac. gradient
-72.5
N/km
Propagation factors · 10 GHz
69/100
Rain
100
14%
Humidity
95
13%
PWAT
50
11%
Season
68
11%
T-Td Depression
75
10%
Refractivity
55
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
33.6, -95.9
19.6 °C
17.3 °C
996.9 mb
-64.7
584.4
37.1 mm
—
13%
33.5, -96.0
20.1 °C
17.5 °C
995.2 mb
-72.3
605.7
40.3 mm
—
25%
33.5, -96.1
19.6 °C
17.6 °C
992.6 mb
-72.5
585.7
38.7 mm
—
38%
33.4, -96.2
19.1 °C
18.1 °C
993.7 mb
-59.5
564.6
44.0 mm
—
Midpoint
33.4, -96.3
19.1 °C
18.1 °C
993.7 mb
-59.5
564.6
44.0 mm
—
63%
33.3, -96.4
18.9 °C
17.4 °C
998.8 mb
-54.9
486.3
40.6 mm
—
75%
33.2, -96.4
20.1 °C
17.9 °C
997.2 mb
-58.9
600.2
41.5 mm
—
88%
33.2, -96.5
18.9 °C
17.8 °C
998.4 mb
-65.0
431.7
40.8 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 75
at 10:00 UTC
· low 60
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 65 | GOOD |
| 22:00 | 61 | MARGINAL |
| 23:00 | 71 | GOOD |
| 00:00 | 68 | GOOD |
| 01:00 | 66 | GOOD |
| 02:00 | 60 | MARGINAL |
| 03:00 | 66 | GOOD |
| 04:00 | 66 | GOOD |
| 05:00 | 68 | GOOD |
| 06:00 | 73 | GOOD |
| 07:00 | 69 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 74 | GOOD |
| 10:00 | 75 | GOOD |
| 11:00 | 75 | GOOD |
| 12:00 | 75 | GOOD |
| 13:00 · now | 74 | GOOD |