Distance
337.0
km · 209.4 mi
Bearing
242.4°
true · rev 62.4°
Terrain
BLOCKED
156.8 dB diffraction
Propagation
72/100
GOOD
Margin
-136.7
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 ≈ 1114 m AGL at the midpoint (3342 m above the chord, 1671 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 23.2 m) clears with margin. The geometric line of sight is obstructed — buried 1516 m below terrain at its worst point.
Great circle
34.564, -93.407 → 33.12, -96.615 · 242.4°
Loss budget · 47 GHz
FSPL (free-space)
176.4
dB
Gaseous (O₂ + H₂O)
21.4
dB
Diffraction
156.8
dB
Rain attenuation
0.0
dB
Total path loss
354.7
dB
Gas rate 0.0634 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.8 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
-354.7
dB
RX antenna gain
30.0
dBi
RX power
-276.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-136.7
dB
Path weather · HRRR average of 9 samples
Temperature
80.2 °F
26.8 °C
Dewpoint
46.6 °F
8.1 °C
T/Td gap
33.6 °F
18.7 °C
Abs. humidity
7.8
g/m³
Pressure
983.9
mb
PWAT
15.9
mm
BL depth
2123.3
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
72/100
Rain
100
14%
Humidity
83
13%
PWAT
80
11%
Season
55
11%
T-Td Depression
96
10%
Refractivity
50
10%
Pressure
82
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
34.6, -93.4
26.2 °C
8.2 °C
994.5 mb
1911.0
15.9 mm
—
13%
34.4, -93.8
24.4 °C
9.7 °C
983.9 mb
1668.8
15.2 mm
—
25%
34.2, -94.2
25.2 °C
11.5 °C
991.8 mb
1799.0
16.4 mm
—
38%
34.0, -94.6
26.8 °C
9.7 °C
1002.6 mb
2178.6
17.4 mm
—
Midpoint
33.8, -95.0
27.6 °C
8.3 °C
1002.5 mb
2402.7
16.8 mm
—
63%
33.7, -95.4
28.0 °C
6.9 °C
997.3 mb
2340.2
15.4 mm
—
75%
33.5, -95.8
27.6 °C
7.7 °C
996.3 mb
2283.3
17.3 mm
—
88%
33.3, -96.2
26.8 °C
7.0 °C
993.0 mb
2148.0
14.8 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 77
at 01:00 UTC
· low 67
at 07:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 75 | GOOD |
| 21:00 | 76 | GOOD |
| 22:00 | 75 | GOOD |
| 23:00 | 75 | GOOD |
| 00:00 | 76 | GOOD |
| 01:00 | 77 | GOOD |
| 02:00 | 75 | GOOD |
| 03:00 | 70 | GOOD |
| 04:00 | 70 | GOOD |
| 05:00 | 70 | GOOD |
| 06:00 | 70 | GOOD |
| 07:00 | 67 | GOOD |
| 08:00 | 72 | GOOD |
| 09:00 | 74 | GOOD |
| 10:00 | 76 | GOOD |
| 11:00 | 76 | GOOD |
| 12:00 · now | 75 | GOOD |