Distance
67.7
km · 42.1 mi
Bearing
284.6°
true · rev 104.6°
Terrain
BLOCKED
93.4 dB diffraction
Propagation
71/100
GOOD
Margin
-42.0
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 ≈ 45 m AGL at the midpoint (135 m above the chord, 68 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 10.4 m) clears with margin. The geometric line of sight is obstructed — buried 66 m below terrain at its worst point.
Great circle
32.968, -95.912 → 33.12, -96.615 · 284.6°
Loss budget · 47 GHz
FSPL (free-space)
162.5
dB
Gaseous (O₂ + H₂O)
4.2
dB
Diffraction
93.4
dB
Rain attenuation
0.0
dB
Total path loss
260.0
dB
Gas rate 0.0616 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.2 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
-260.0
dB
RX antenna gain
30.0
dBi
RX power
-182.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-42.0
dB
Path weather · HRRR average of 9 samples
Temperature
80.9 °F
27.2 °C
Dewpoint
44.5 °F
6.9 °C
T/Td gap
36.4 °F
20.2 °C
Abs. humidity
7.2
g/m³
Pressure
994.1
mb
PWAT
14.9
mm
BL depth
2299.0
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
71/100
Rain
100
14%
Humidity
87
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, -95.9
27.1 °C
5.5 °C
999.0 mb
2281.0
13.4 mm
—
13%
33.0, -96.0
28.5 °C
5.6 °C
999.9 mb
2417.2
16.1 mm
—
25%
33.0, -96.1
27.2 °C
6.9 °C
999.7 mb
2301.7
14.8 mm
—
38%
33.0, -96.2
27.2 °C
6.9 °C
999.7 mb
2301.7
14.8 mm
—
Midpoint
33.0, -96.3
27.1 °C
6.9 °C
998.4 mb
2204.3
13.8 mm
—
63%
33.1, -96.4
25.7 °C
9.1 °C
996.9 mb
2206.6
14.9 mm
—
75%
33.1, -96.4
26.8 °C
8.8 °C
997.3 mb
2300.2
16.3 mm
—
88%
33.1, -96.5
26.8 °C
8.8 °C
997.3 mb
2300.2
16.3 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 79
at 03:00 UTC
· low 66
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 78 | GOOD |
| 21:00 | 78 | GOOD |
| 22:00 | 78 | GOOD |
| 23:00 | 78 | GOOD |
| 00:00 | 77 | GOOD |
| 01:00 | 76 | GOOD |
| 02:00 | 78 | GOOD |
| 03:00 | 79 | GOOD |
| 04:00 | 78 | GOOD |
| 05:00 | 76 | GOOD |
| 06:00 | 77 | GOOD |
| 07:00 | 78 | GOOD |
| 08:00 | 77 | GOOD |
| 09:00 | 76 | GOOD |
| 10:00 | 76 | GOOD |
| 11:00 | 73 | GOOD |
| 12:00 · now | 66 | GOOD |