Distance
155.1
km · 96.4 mi
Bearing
116.0°
true · rev 296.0°
Terrain
BLOCKED
132.5 dB diffraction
Propagation
73/100
GOOD
Margin
-93.7
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 ≈ 236 m AGL at the midpoint (708 m above the chord, 354 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 15.7 m) clears with margin. The geometric line of sight is obstructed — buried 407 m below terrain at its worst point.
Great circle
33.741, -98.112 → 33.12, -96.615 · 116.0°
Loss budget · 47 GHz
FSPL (free-space)
169.7
dB
Gaseous (O₂ + H₂O)
9.5
dB
Diffraction
132.5
dB
Rain attenuation
0.0
dB
Total path loss
311.7
dB
Gas rate 0.0611 dB/km · H₂O 0.0030 dB/km/g · O₂ 0.0400 dB/km
Path abs. humidity avg 7.0 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
-311.7
dB
RX antenna gain
30.0
dBi
RX power
-233.7
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-93.7
dB
Path weather · HRRR average of 9 samples
Temperature
80.0 °F
26.7 °C
Dewpoint
43.8 °F
6.5 °C
T/Td gap
36.2 °F
20.1 °C
Abs. humidity
7.0
g/m³
Pressure
976.9
mb
PWAT
14.2
mm
BL depth
2261.8
m AGL
Refrac. gradient
0
N/km
Propagation factors · 47 GHz
73/100
Rain
100
14%
Humidity
88
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
33.7, -98.1
27.2 °C
4.5 °C
982.8 mb
2334.2
12.2 mm
—
13%
33.7, -97.9
26.4 °C
5.1 °C
979.0 mb
2249.9
12.3 mm
—
25%
33.6, -97.7
25.6 °C
6.7 °C
976.9 mb
2274.3
13.2 mm
—
38%
33.5, -97.6
25.4 °C
7.3 °C
982.6 mb
2056.9
12.5 mm
—
Midpoint
33.4, -97.4
24.7 °C
9.8 °C
983.6 mb
2071.5
15.0 mm
—
63%
33.4, -97.2
27.3 °C
7.0 °C
993.0 mb
2235.5
14.1 mm
—
75%
33.3, -97.0
27.0 °C
6.4 °C
994.5 mb
2280.0
15.1 mm
—
88%
33.2, -96.8
28.1 °C
5.7 °C
991.9 mb
2354.5
15.8 mm
—
Destination
33.1, -96.6
28.4 °C
6.3 °C
993.9 mb
2499.5
17.5 mm
—
Midpoint vertical profile
18-hour forecast · this path · 47 GHz
→ steady
Peak 79
at 20:00 UTC
· low 62
at 12:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 79 | GOOD |
| 21:00 | 79 | GOOD |
| 22:00 | 78 | GOOD |
| 23:00 | 78 | GOOD |
| 00:00 | 75 | GOOD |
| 01:00 | 72 | GOOD |
| 02:00 | 75 | GOOD |
| 03:00 | 76 | GOOD |
| 04:00 | 75 | GOOD |
| 05:00 | 74 | GOOD |
| 06:00 | 76 | GOOD |
| 07:00 | 75 | GOOD |
| 08:00 | 74 | GOOD |
| 09:00 | 74 | GOOD |
| 10:00 | 75 | GOOD |
| 11:00 | 73 | GOOD |
| 12:00 | 62 | MARGINAL |
| 13:00 · now | 63 | MARGINAL |