Distance
180.1
km · 111.9 mi
Bearing
93.2°
true · rev 273.2°
Terrain
BLOCKED
134.3 dB diffraction
Propagation
73/100
GOOD
Margin
-98.2
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 ≈ 318 m AGL at the midpoint (955 m above the chord, 477 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 17.0 m) clears with margin. The geometric line of sight is obstructed — buried 482 m below terrain at its worst point.
Great circle
33.226, -98.546 → 33.12, -96.615 · 93.2°
Loss budget · 47 GHz
FSPL (free-space)
171.0
dB
Gaseous (O₂ + H₂O)
10.8
dB
Diffraction
134.3
dB
Rain attenuation
0.0
dB
Total path loss
316.2
dB
Gas rate 0.0601 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 6.7 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
-316.2
dB
RX antenna gain
30.0
dBi
RX power
-238.2
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-98.2
dB
Path weather · HRRR average of 9 samples
Temperature
80.5 °F
27.0 °C
Dewpoint
42.6 °F
5.9 °C
T/Td gap
37.9 °F
21.1 °C
Abs. humidity
6.7
g/m³
Pressure
970.9
mb
PWAT
13.2
mm
BL depth
2307.0
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
90
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
88
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
33.2, -98.5
26.3 °C
4.7 °C
970.9 mb
2223.1
11.9 mm
—
13%
33.2, -98.3
26.9 °C
5.2 °C
978.1 mb
2228.6
12.2 mm
—
25%
33.2, -98.1
26.9 °C
5.5 °C
981.1 mb
2268.8
12.6 mm
—
38%
33.2, -97.8
27.3 °C
3.8 °C
984.9 mb
2338.0
11.1 mm
—
Midpoint
33.2, -97.6
27.3 °C
7.3 °C
989.5 mb
2445.7
16.2 mm
—
63%
33.2, -97.3
25.2 °C
10.1 °C
989.3 mb
2294.0
15.1 mm
—
75%
33.1, -97.1
27.1 °C
6.3 °C
996.2 mb
2253.7
12.1 mm
—
88%
33.1, -96.9
27.3 °C
6.2 °C
995.3 mb
2332.9
14.2 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 23:00 UTC
· low 65
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 79 | GOOD |
| 21:00 | 79 | GOOD |
| 22:00 | 79 | GOOD |
| 23:00 | 80 | EXCELLENT |
| 00:00 | 71 | GOOD |
| 01:00 | 71 | GOOD |
| 02:00 | 72 | GOOD |
| 03:00 | 80 | EXCELLENT |
| 04:00 | 79 | GOOD |
| 05:00 | 77 | GOOD |
| 06:00 | 77 | GOOD |
| 07:00 | 77 | GOOD |
| 08:00 | 74 | GOOD |
| 09:00 | 74 | GOOD |
| 10:00 | 75 | GOOD |
| 11:00 | 67 | GOOD |
| 12:00 · now | 65 | GOOD |