Distance
80.5
km · 50.0 mi
Bearing
141.1°
true · rev 321.1°
Terrain
BLOCKED
82.9 dB diffraction
Propagation
68/100
GOOD
Margin
-16.0
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 ≈ 64 m AGL at the midpoint (191 m above the chord, 95 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 24.6 m) clears with margin. The geometric line of sight is obstructed — buried 93 m below terrain at its worst point.
Great circle
33.684, -97.159 → 33.12, -96.615 · 141.1°
Loss budget · 10 GHz
FSPL (free-space)
150.6
dB
Gaseous (O₂ + H₂O)
0.6
dB
Diffraction
82.9
dB
Rain attenuation
0.0
dB
Total path loss
234.0
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 7.1 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
-234.0
dB
RX antenna gain
30.0
dBi
RX power
-156.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-16.0
dB
Path weather · HRRR average of 9 samples
Temperature
81.4 °F
27.4 °C
Dewpoint
44.0 °F
6.6 °C
T/Td gap
37.4 °F
20.8 °C
Abs. humidity
7.1
g/m³
Pressure
988.8
mb
PWAT
14.9
mm
BL depth
2287.4
m AGL
Refrac. gradient
0
N/km
Propagation factors · 10 GHz
68/100
Rain
100
14%
Humidity
82
13%
PWAT
75
11%
Season
68
11%
T-Td Depression
55
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
33.7, -97.2
26.6 °C
8.7 °C
988.8 mb
2168.0
15.1 mm
—
13%
33.6, -97.1
26.6 °C
8.7 °C
988.8 mb
2168.0
15.1 mm
—
25%
33.5, -97.0
27.3 °C
7.0 °C
991.6 mb
2251.0
14.2 mm
—
38%
33.5, -97.0
27.3 °C
7.0 °C
991.6 mb
2251.0
14.2 mm
—
Midpoint
33.4, -96.9
27.6 °C
5.9 °C
993.6 mb
2289.9
14.3 mm
—
63%
33.3, -96.8
27.6 °C
5.9 °C
993.6 mb
2289.9
14.3 mm
—
75%
33.3, -96.8
28.1 °C
5.7 °C
991.9 mb
2354.5
15.8 mm
—
88%
33.2, -96.7
27.6 °C
4.7 °C
994.3 mb
2315.0
13.5 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 · 10 GHz
→ steady
Peak 81
at 10:00 UTC
· low 73
at 20:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 20:00 | 73 | GOOD |
| 21:00 | 73 | GOOD |
| 22:00 | 73 | GOOD |
| 23:00 | 73 | GOOD |
| 00:00 | 74 | GOOD |
| 01:00 | 75 | GOOD |
| 02:00 | 75 | GOOD |
| 03:00 | 74 | GOOD |
| 04:00 | 78 | GOOD |
| 05:00 | 77 | GOOD |
| 06:00 | 78 | GOOD |
| 07:00 | 78 | GOOD |
| 08:00 | 77 | GOOD |
| 09:00 | 80 | EXCELLENT |
| 10:00 | 81 | EXCELLENT |
| 11:00 | 81 | EXCELLENT |
| 12:00 | 76 | GOOD |
| 13:00 · now | 74 | GOOD |