Distance
43.7
km · 27.1 mi
Bearing
209.6°
true · rev 29.6°
Terrain
BLOCKED
31.5 dB diffraction
Propagation
79/100
GOOD
Margin
+41.0
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 ≈ 19 m AGL at the midpoint (56 m above the chord, 28 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 18.1 m) clears with margin. The geometric line of sight is obstructed — buried 9 m below terrain at its worst point.
Great circle
33.462, -96.384 → 33.12, -96.615 · 209.6°
Loss budget · 10 GHz
FSPL (free-space)
145.2
dB
Gaseous (O₂ + H₂O)
0.3
dB
Diffraction
31.5
dB
Rain attenuation
0.0
dB
Total path loss
177.0
dB
Gas rate 0.0071 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 13.8 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
-177.0
dB
RX antenna gain
30.0
dBi
RX power
-99.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
41.0
dB
Path weather · HRRR average of 9 samples
Temperature
73.9 °F
23.3 °C
Dewpoint
61.8 °F
16.5 °C
T/Td gap
12.1 °F
6.7 °C
Abs. humidity
13.8
g/m³
Pressure
983.8
mb
PWAT
21.9
mm
BL depth
252.2
m AGL
Refrac. gradient
-123.5
N/km · super-refractive
Propagation factors · 10 GHz
79/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
85
10%
Refractivity
82
10%
Pressure
82
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
33.5, -96.4
23.4 °C
16.3 °C
983.8 mb
-122.5
260.9
21.5 mm
—
13%
33.4, -96.4
22.6 °C
17.1 °C
986.2 mb
-122.6
250.2
22.0 mm
—
25%
33.4, -96.4
23.2 °C
16.2 °C
987.0 mb
-108.6
256.9
21.8 mm
—
38%
33.3, -96.5
23.2 °C
16.2 °C
987.0 mb
-108.6
256.9
21.8 mm
—
Midpoint
33.3, -96.5
22.9 °C
17.0 °C
988.8 mb
-123.5
237.3
21.9 mm
—
63%
33.2, -96.5
22.9 °C
17.0 °C
988.8 mb
-123.5
237.3
21.9 mm
—
75%
33.2, -96.6
22.9 °C
17.0 °C
988.8 mb
-123.5
237.3
21.9 mm
—
88%
33.2, -96.6
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 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 · 10 GHz
→ steady
Peak 85
at 08:00 UTC
· low 70
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 85 | EXCELLENT |
| 09:00 | 85 | EXCELLENT |
| 10:00 | 79 | GOOD |
| 11:00 | 78 | GOOD |
| 12:00 | 77 | GOOD |
| 13:00 | 78 | GOOD |
| 14:00 | 79 | GOOD |
| 15:00 | 77 | GOOD |
| 16:00 | 73 | GOOD |
| 17:00 | 75 | GOOD |
| 18:00 | 81 | EXCELLENT |
| 19:00 | 74 | GOOD |
| 20:00 | 80 | EXCELLENT |
| 21:00 | 79 | GOOD |
| 22:00 | 70 | GOOD |
| 23:00 | 71 | GOOD |
| 00:00 | 72 | GOOD |
| 01:00 · now | 73 | GOOD |