Distance
22.0
km · 13.7 mi
Bearing
67.5°
true · rev 247.5°
Terrain
BLOCKED
89.4 dB diffraction
Propagation
71/100
GOOD
Margin
-25.4
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 ≈ 5 m AGL at the midpoint (14 m above the chord, 7 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 5.9 m) clears with margin. The geometric line of sight is obstructed — buried 29 m below terrain at its worst point.
Great circle
33.045, -96.834 → 33.12, -96.615 · 67.5°
Loss budget · 47 GHz
FSPL (free-space)
152.7
dB
Gaseous (O₂ + H₂O)
1.4
dB
Diffraction
89.4
dB
Rain attenuation
0.0
dB
Total path loss
243.4
dB
Gas rate 0.0614 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.1 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
-243.4
dB
RX antenna gain
30.0
dBi
RX power
-165.4
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-25.4
dB
Path weather · HRRR average of 9 samples
Temperature
81.5 °F
27.5 °C
Dewpoint
44.0 °F
6.7 °C
T/Td gap
37.5 °F
20.8 °C
Abs. humidity
7.1
g/m³
Pressure
992.1
mb
PWAT
16.8
mm
BL depth
2376.3
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
71/100
Rain
100
14%
Humidity
88
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
70
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
33.0, -96.8
27.1 °C
7.5 °C
995.0 mb
2330.0
16.8 mm
—
13%
33.1, -96.8
27.2 °C
6.3 °C
993.3 mb
2401.0
17.5 mm
—
25%
33.1, -96.8
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 mm
—
38%
33.1, -96.8
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 mm
—
Midpoint
33.1, -96.7
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 mm
—
63%
33.1, -96.7
27.0 °C
6.8 °C
992.1 mb
2289.3
16.2 mm
—
75%
33.1, -96.7
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
88%
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
Destination
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
Midpoint vertical profile
18-hour forecast · this path · 47 GHz
→ steady
Peak 80
at 01:00 UTC
· low 66
at 13:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 78 | GOOD |
| 21:00 | 76 | GOOD |
| 22:00 | 77 | GOOD |
| 23:00 | 79 | GOOD |
| 00:00 | 78 | GOOD |
| 01:00 | 80 | EXCELLENT |
| 02:00 | 80 | EXCELLENT |
| 03:00 | 78 | GOOD |
| 04:00 | 78 | GOOD |
| 05:00 | 79 | GOOD |
| 06:00 | 80 | EXCELLENT |
| 07:00 | 80 | EXCELLENT |
| 08:00 | 80 | EXCELLENT |
| 09:00 | 79 | GOOD |
| 10:00 | 80 | EXCELLENT |
| 11:00 | 78 | GOOD |
| 12:00 | 67 | GOOD |
| 13:00 · now | 66 | GOOD |