Distance
45.6
km · 28.3 mi
Bearing
171.1°
true · rev 351.1°
Terrain
BLOCKED
39.9 dB diffraction
Propagation
77/100
GOOD
Margin
+32.1
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 ≈ 20 m AGL at the midpoint (61 m above the chord, 31 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 18.5 m) clears with margin. The geometric line of sight is obstructed — buried 15 m below terrain at its worst point.
Great circle
33.525, -96.691 → 33.12, -96.615 · 171.1°
Loss budget · 10 GHz
FSPL (free-space)
145.6
dB
Gaseous (O₂ + H₂O)
0.3
dB
Diffraction
39.9
dB
Rain attenuation
0.0
dB
Total path loss
185.9
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 13.2 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
-185.9
dB
RX antenna gain
30.0
dBi
RX power
-107.9
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
32.1
dB
Path weather · HRRR average of 9 samples
Temperature
74.9 °F
23.8 °C
Dewpoint
60.6 °F
15.9 °C
T/Td gap
14.3 °F
7.9 °C
Abs. humidity
13.2
g/m³
Pressure
980.6
mb
PWAT
22.4
mm
BL depth
296.7
m AGL
Refrac. gradient
-119.7
N/km · super-refractive
Propagation factors · 10 GHz
77/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
70
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, -96.7
23.3 °C
16.3 °C
983.2 mb
-102.9
358.3
23.8 mm
—
13%
33.5, -96.7
23.7 °C
16.1 °C
980.6 mb
-119.7
317.8
22.8 mm
—
25%
33.4, -96.7
23.9 °C
15.8 °C
986.1 mb
-102.5
307.6
22.3 mm
—
38%
33.4, -96.7
23.9 °C
15.8 °C
986.1 mb
-102.5
307.6
22.3 mm
—
Midpoint
33.3, -96.7
23.9 °C
15.8 °C
986.1 mb
-102.5
307.6
22.3 mm
—
63%
33.3, -96.6
23.7 °C
15.6 °C
987.5 mb
-91.6
269.3
22.0 mm
—
75%
33.2, -96.6
23.7 °C
15.6 °C
987.5 mb
-91.6
269.3
22.0 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 80
at 08:00 UTC
· low 70
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 80 | EXCELLENT |
| 09:00 | 77 | GOOD |
| 10:00 | 79 | GOOD |
| 11:00 | 79 | GOOD |
| 12:00 | 78 | GOOD |
| 13:00 | 79 | GOOD |
| 14:00 | 79 | GOOD |
| 15:00 | 75 | GOOD |
| 16:00 | 74 | GOOD |
| 17:00 | 76 | GOOD |
| 18:00 | 73 | GOOD |
| 19:00 | 79 | GOOD |
| 20:00 | 79 | GOOD |
| 21:00 | 77 | GOOD |
| 22:00 | 70 | GOOD |
| 23:00 | 71 | GOOD |
| 00:00 | 70 | GOOD |
| 01:00 · now | 70 | GOOD |