Distance
60.0
km · 37.3 mi
Bearing
32.4°
true · rev 212.4°
Terrain
BLOCKED
63.3 dB diffraction
Propagation
73/100
GOOD
Margin
-10.2
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 ≈ 35 m AGL at the midpoint (106 m above the chord, 53 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 9.8 m) clears with margin. The geometric line of sight is obstructed — buried 50 m below terrain at its worst point.
Great circle
32.665, -96.961 → 33.12, -96.615 · 32.4°
Loss budget · 47 GHz
FSPL (free-space)
161.4
dB
Gaseous (O₂ + H₂O)
3.5
dB
Diffraction
63.3
dB
Rain attenuation
0.0
dB
Total path loss
228.2
dB
Gas rate 0.0580 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 6.0 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
-228.2
dB
RX antenna gain
30.0
dBi
RX power
-150.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-10.2
dB
Path weather · HRRR average of 9 samples
Temperature
82.7 °F
28.1 °C
Dewpoint
39.7 °F
4.3 °C
T/Td gap
42.9 °F
23.9 °C
Abs. humidity
6.0
g/m³
Pressure
993.2
mb
PWAT
14.1
mm
BL depth
2372.0
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
100
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
32.7, -97.0
27.8 °C
5.4 °C
998.2 mb
2291.4
12.6 mm
—
13%
32.7, -96.9
28.5 °C
3.8 °C
997.9 mb
2366.4
13.4 mm
—
25%
32.8, -96.9
28.5 °C
3.8 °C
997.9 mb
2366.4
13.4 mm
—
38%
32.8, -96.8
28.4 °C
3.6 °C
999.3 mb
2334.7
14.1 mm
—
Midpoint
32.9, -96.8
28.6 °C
4.4 °C
998.6 mb
2409.0
14.4 mm
—
63%
32.9, -96.7
27.6 °C
5.0 °C
993.2 mb
2412.1
15.4 mm
—
75%
33.0, -96.7
27.6 °C
5.0 °C
993.2 mb
2412.1
15.4 mm
—
88%
33.1, -96.7
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 81
at 20:00 UTC
· low 63
at 11:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 81 | EXCELLENT |
| 21:00 | 79 | GOOD |
| 22:00 | 79 | GOOD |
| 23:00 | 78 | GOOD |
| 00:00 | 78 | GOOD |
| 01:00 | 79 | GOOD |
| 02:00 | 78 | GOOD |
| 03:00 | 73 | GOOD |
| 04:00 | 79 | GOOD |
| 05:00 | 79 | GOOD |
| 06:00 | 79 | GOOD |
| 07:00 | 77 | GOOD |
| 08:00 | 76 | GOOD |
| 09:00 | 76 | GOOD |
| 10:00 | 74 | GOOD |
| 11:00 | 63 | MARGINAL |
| 12:00 · now | 64 | MARGINAL |