Distance
44.5
km · 27.7 mi
Bearing
149.1°
true · rev 329.1°
Terrain
BLOCKED
77.6 dB diffraction
Propagation
76/100
GOOD
Margin
-5.3
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 (58 m above the chord, 29 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 18.3 m) clears with margin. The geometric line of sight is obstructed — buried 58 m below terrain at its worst point.
Great circle
33.464, -96.861 → 33.12, -96.615 · 149.1°
Loss budget · 10 GHz
FSPL (free-space)
145.4
dB
Gaseous (O₂ + H₂O)
0.3
dB
Diffraction
77.6
dB
Rain attenuation
0.0
dB
Total path loss
223.3
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 12.8 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
-223.3
dB
RX antenna gain
30.0
dBi
RX power
-145.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-5.3
dB
Path weather · HRRR average of 9 samples
Temperature
74.9 °F
23.8 °C
Dewpoint
59.7 °F
15.4 °C
T/Td gap
15.1 °F
8.4 °C
Abs. humidity
12.8
g/m³
Pressure
983.0
mb
PWAT
22.6
mm
BL depth
299.5
m AGL
Refrac. gradient
-97.4
N/km
Propagation factors · 10 GHz
76/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
70
10%
Refractivity
68
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, -96.9
23.9 °C
15.1 °C
985.4 mb
-97.4
354.6
24.0 mm
—
13%
33.4, -96.8
23.7 °C
15.3 °C
986.5 mb
-81.8
339.3
23.5 mm
—
25%
33.4, -96.8
23.3 °C
15.5 °C
983.0 mb
-87.6
317.3
22.9 mm
—
38%
33.3, -96.8
23.3 °C
15.5 °C
983.0 mb
-87.6
317.3
22.9 mm
—
Midpoint
33.3, -96.7
24.1 °C
14.8 °C
985.1 mb
-64.2
282.1
21.9 mm
—
63%
33.2, -96.7
24.1 °C
14.8 °C
985.1 mb
-64.2
282.1
21.9 mm
—
75%
33.2, -96.7
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 83
at 10:00 UTC
· low 68
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 80 | EXCELLENT |
| 09:00 | 76 | GOOD |
| 10:00 | 83 | EXCELLENT |
| 11:00 | 79 | GOOD |
| 12:00 | 81 | EXCELLENT |
| 13:00 | 79 | GOOD |
| 14:00 | 79 | GOOD |
| 15:00 | 75 | GOOD |
| 16:00 | 78 | GOOD |
| 17:00 | 79 | GOOD |
| 18:00 | 77 | GOOD |
| 19:00 | 76 | GOOD |
| 20:00 | 79 | GOOD |
| 21:00 | 77 | GOOD |
| 22:00 | 68 | GOOD |
| 23:00 | 68 | GOOD |
| 00:00 | 71 | GOOD |
| 01:00 · now | 70 | GOOD |