Distance
110.2
km · 68.5 mi
Bearing
43.9°
true · rev 223.9°
Terrain
BLOCKED
111.8 dB diffraction
Propagation
55/100
MARGINAL
Margin
-69.9
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 ≈ 119 m AGL at the midpoint (358 m above the chord, 179 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 13.3 m) clears with margin. The geometric line of sight is obstructed — buried 152 m below terrain at its worst point.
Great circle
32.477, -97.273 → 33.189, -96.452 · 43.9°
Loss budget · 47 GHz
FSPL (free-space)
166.7
dB
Gaseous (O₂ + H₂O)
9.4
dB
Diffraction
111.8
dB
Rain attenuation
0.0
dB
Total path loss
287.9
dB
Gas rate 0.0852 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 15.1 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
-287.9
dB
RX antenna gain
30.0
dBi
RX power
-209.9
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-69.9
dB
Path weather · HRRR average of 9 samples
Temperature
70.8 °F
21.5 °C
Dewpoint
64.1 °F
17.9 °C
T/Td gap
6.6 °F
3.7 °C
Abs. humidity
15.1
g/m³
Pressure
987.9
mb
PWAT
39.6
mm
BL depth
507.5
m AGL
Refrac. gradient
-73.4
N/km
Propagation factors · 47 GHz
55/100
Rain
100
14%
Humidity
31
13%
PWAT
35
11%
Season
55
11%
T-Td Depression
38
10%
Refractivity
55
10%
Pressure
82
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
18
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-10 21:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.5, -97.3
24.1 °C
17.9 °C
987.9 mb
-48.9
463.3
37.8 mm
—
13%
32.6, -97.2
22.1 °C
18.2 °C
993.3 mb
-50.4
526.4
40.5 mm
—
25%
32.7, -97.1
22.1 °C
18.2 °C
993.3 mb
-50.4
526.4
40.5 mm
—
38%
32.7, -97.0
23.7 °C
17.9 °C
999.8 mb
-52.6
656.0
41.6 mm
—
Midpoint
32.8, -96.9
22.3 °C
17.4 °C
999.1 mb
-64.4
491.9
38.1 mm
—
63%
32.9, -96.8
20.7 °C
17.6 °C
998.3 mb
-73.4
433.5
37.3 mm
—
75%
33.0, -96.7
19.7 °C
18.0 °C
998.0 mb
-71.9
438.2
38.7 mm
—
88%
33.1, -96.6
18.9 °C
17.8 °C
998.4 mb
-65.0
431.7
40.8 mm
—
Destination
33.2, -96.5
20.1 °C
17.9 °C
997.2 mb
-58.9
600.2
41.5 mm
—
Midpoint vertical profile
17-hour forecast · this path · 47 GHz
→ steady
Peak 60
at 13:00 UTC
· low 43
at 02:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 21:00 | 56 | MARGINAL |
| 22:00 | 53 | MARGINAL |
| 23:00 | 54 | MARGINAL |
| 00:00 | 53 | MARGINAL |
| 01:00 | 52 | MARGINAL |
| 02:00 | 43 | POOR |
| 03:00 | 47 | POOR |
| 04:00 | 52 | MARGINAL |
| 05:00 | 53 | MARGINAL |
| 06:00 | 53 | MARGINAL |
| 07:00 | 54 | MARGINAL |
| 08:00 | 53 | MARGINAL |
| 09:00 | 54 | MARGINAL |
| 10:00 | 56 | MARGINAL |
| 11:00 | 55 | MARGINAL |
| 12:00 | 56 | MARGINAL |
| 13:00 · now | 60 | MARGINAL |