Distance
45.6
km · 28.3 mi
Bearing
171.1°
true · rev 351.1°
Terrain
BLOCKED
64.6 dB diffraction
Propagation
73/100
GOOD
Margin
-8.3
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 ≈ 20 m AGL at the midpoint (61 m above the chord, 31 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 8.5 m) clears with margin. The geometric line of sight is obstructed — buried 19 m below terrain at its worst point.
Great circle
33.525, -96.691 → 33.12, -96.615 · 171.1°
Loss budget · 47 GHz
FSPL (free-space)
159.1
dB
Gaseous (O₂ + H₂O)
2.7
dB
Diffraction
64.6
dB
Rain attenuation
0.0
dB
Total path loss
226.3
dB
Gas rate 0.0584 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 6.2 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
-226.3
dB
RX antenna gain
30.0
dBi
RX power
-148.3
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-8.3
dB
Path weather · HRRR average of 9 samples
Temperature
82.1 °F
27.8 °C
Dewpoint
40.4 °F
4.7 °C
T/Td gap
41.6 °F
23.1 °C
Abs. humidity
6.2
g/m³
Pressure
987.4
mb
PWAT
13.6
mm
BL depth
2314.8
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
94
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
82
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-03 20:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
33.5, -96.7
27.1 °C
5.9 °C
990.2 mb
2210.9
12.9 mm
—
13%
33.5, -96.7
27.3 °C
5.2 °C
987.4 mb
2239.8
13.8 mm
—
25%
33.4, -96.7
27.9 °C
4.2 °C
993.0 mb
2277.3
13.1 mm
—
38%
33.4, -96.7
27.9 °C
4.2 °C
993.0 mb
2277.3
13.1 mm
—
Midpoint
33.3, -96.7
27.9 °C
4.2 °C
993.0 mb
2277.3
13.1 mm
—
63%
33.3, -96.6
27.8 °C
5.4 °C
994.2 mb
2397.3
14.6 mm
—
75%
33.2, -96.6
27.8 °C
5.4 °C
994.2 mb
2397.3
14.6 mm
—
88%
33.2, -96.6
28.2 °C
3.9 °C
994.1 mb
2377.9
13.9 mm
—
Destination
33.1, -96.6
28.2 °C
3.9 °C
994.1 mb
2377.9
13.9 mm
—
Midpoint vertical profile
17-hour forecast · this path · 47 GHz
→ steady
Peak 80
at 20:00 UTC
· low 68
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 80 | EXCELLENT |
| 21:00 | 80 | EXCELLENT |
| 22:00 | 79 | GOOD |
| 23:00 | 79 | GOOD |
| 00:00 | 80 | EXCELLENT |
| 01:00 | 79 | GOOD |
| 02:00 | 79 | GOOD |
| 03:00 | 80 | EXCELLENT |
| 04:00 | 78 | GOOD |
| 05:00 | 79 | GOOD |
| 06:00 | 79 | GOOD |
| 07:00 | 79 | GOOD |
| 08:00 | 79 | GOOD |
| 09:00 | 79 | GOOD |
| 10:00 | 78 | GOOD |
| 11:00 | 78 | GOOD |
| 12:00 · now | 68 | GOOD |