Distance
64.0
km · 39.8 mi
Bearing
36.5°
true · rev 216.5°
Terrain
BLOCKED
74.1 dB diffraction
Propagation
79/100
GOOD
Margin
-5.1
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 ≈ 40 m AGL at the midpoint (121 m above the chord, 60 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 21.9 m) clears with margin. The geometric line of sight is obstructed — buried 59 m below terrain at its worst point.
Great circle
32.658, -97.025 → 33.12, -96.615 · 36.5°
Loss budget · 10 GHz
FSPL (free-space)
148.6
dB
Gaseous (O₂ + H₂O)
0.5
dB
Diffraction
74.1
dB
Rain attenuation
0.0
dB
Total path loss
223.1
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 13.4 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
-223.1
dB
RX antenna gain
30.0
dBi
RX power
-145.1
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-5.1
dB
Path weather · HRRR average of 9 samples
Temperature
74.8 °F
23.8 °C
Dewpoint
61.0 °F
16.1 °C
T/Td gap
13.8 °F
7.7 °C
Abs. humidity
13.4
g/m³
Pressure
986.8
mb
PWAT
23.7
mm
BL depth
293.0
m AGL
Refrac. gradient
-102.0
N/km · super-refractive
Propagation factors · 10 GHz
79/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
85
10%
Refractivity
82
10%
Pressure
82
10%
Sky Cover
50
8%
Wind
50
8%
Time of Day
55
4%
Atmospheric profile
HRRR 3 km
Valid 2026-05-15 08:00 UTC
· 9 samples
Point
Lat, lon
Temp
Dewpt
Press
dN/dh
BL m
PWAT
Duct
Source
32.7, -97.0
23.2 °C
16.1 °C
991.5 mb
-102.0
262.9
24.4 mm
—
13%
32.7, -97.0
23.7 °C
15.5 °C
993.7 mb
-82.6
268.9
24.3 mm
—
25%
32.8, -96.9
24.2 °C
16.2 °C
991.3 mb
-86.6
300.0
24.0 mm
—
38%
32.8, -96.9
23.7 °C
16.1 °C
993.0 mb
-80.7
335.5
24.5 mm
—
Midpoint
32.9, -96.8
23.7 °C
16.1 °C
993.0 mb
-80.7
335.5
24.5 mm
—
63%
32.9, -96.8
24.5 °C
15.6 °C
986.8 mb
-81.7
310.9
22.9 mm
—
75%
33.0, -96.7
24.5 °C
15.6 °C
986.8 mb
-81.7
310.9
22.9 mm
—
88%
33.1, -96.7
22.2 °C
17.8 °C
991.0 mb
-90.0
245.8
23.3 mm
—
Destination
33.1, -96.6
24.1 °C
16.0 °C
987.4 mb
-91.5
266.6
22.0 mm
—
Midpoint vertical profile
18-hour forecast · this path · 10 GHz
→ steady
Peak 85
at 09:00 UTC
· low 70
at 22:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 76 | GOOD |
| 09:00 | 85 | EXCELLENT |
| 10:00 | 79 | GOOD |
| 11:00 | 80 | EXCELLENT |
| 12:00 | 83 | EXCELLENT |
| 13:00 | 80 | EXCELLENT |
| 14:00 | 78 | GOOD |
| 15:00 | 77 | GOOD |
| 16:00 | 74 | GOOD |
| 17:00 | 80 | EXCELLENT |
| 18:00 | 81 | EXCELLENT |
| 19:00 | 80 | EXCELLENT |
| 20:00 | 77 | GOOD |
| 21:00 | 77 | GOOD |
| 22:00 | 70 | GOOD |
| 23:00 | 71 | GOOD |
| 00:00 | 75 | GOOD |
| 01:00 · now | 75 | GOOD |