Distance
100.1
km · 62.2 mi
Bearing
155.6°
true · rev 335.6°
Terrain
BLOCKED
90.9 dB diffraction
Propagation
78/100
GOOD
Margin
-26.0
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 ≈ 98 m AGL at the midpoint (295 m above the chord, 147 m above the 4/3 horizon), so its Fresnel zone (F₁ ≈ 27.4 m) clears with margin. The geometric line of sight is obstructed — buried 138 m below terrain at its worst point.
Great circle
33.94, -97.06 → 33.12, -96.615 · 155.6°
Loss budget · 10 GHz
FSPL (free-space)
152.4
dB
Gaseous (O₂ + H₂O)
0.7
dB
Diffraction
90.9
dB
Rain attenuation
0.0
dB
Total path loss
244.0
dB
Gas rate 0.0070 dB/km · H₂O 0.0000 dB/km/g · O₂ 0.0070 dB/km
Path abs. humidity avg 13.6 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
-244.0
dB
RX antenna gain
30.0
dBi
RX power
-166.0
dBm
Sensitivity (CW, 500 Hz)
-141.0
dBm
Margin
-26.0
dB
Path weather · HRRR average of 9 samples
Temperature
74.1 °F
23.4 °C
Dewpoint
61.4 °F
16.3 °C
T/Td gap
12.7 °F
7.1 °C
Abs. humidity
13.6
g/m³
Pressure
979.6
mb
PWAT
25.1
mm
BL depth
323.4
m AGL
Refrac. gradient
-97.4
N/km
Propagation factors · 10 GHz
78/100
Rain
100
14%
Humidity
90
13%
PWAT
90
11%
Season
68
11%
T-Td Depression
85
10%
Refractivity
68
10%
Pressure
88
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
33.9, -97.1
23.5 °C
17.8 °C
983.6 mb
-67.8
352.9
29.9 mm
—
13%
33.8, -97.0
22.7 °C
17.9 °C
984.5 mb
-76.9
337.1
29.3 mm
—
25%
33.7, -96.9
22.5 °C
17.5 °C
979.6 mb
-82.0
340.1
27.5 mm
—
38%
33.6, -96.9
23.5 °C
16.0 °C
981.8 mb
-88.1
355.1
25.3 mm
—
Midpoint
33.5, -96.8
23.9 °C
15.1 °C
985.4 mb
-97.4
354.6
24.0 mm
—
63%
33.4, -96.8
23.3 °C
15.5 °C
983.0 mb
-87.6
317.3
22.9 mm
—
75%
33.3, -96.7
23.3 °C
15.5 °C
983.0 mb
-87.6
317.3
22.9 mm
—
88%
33.2, -96.7
23.7 °C
15.6 °C
987.5 mb
-91.6
269.3
22.0 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 81
at 16:00 UTC
· low 66
at 00:00 UTC
| Hour UTC | Score | Rating |
|---|---|---|
| 08:00 | 74 | GOOD |
| 09:00 | 73 | GOOD |
| 10:00 | 80 | EXCELLENT |
| 11:00 | 75 | GOOD |
| 12:00 | 76 | GOOD |
| 13:00 | 77 | GOOD |
| 14:00 | 77 | GOOD |
| 15:00 | 75 | GOOD |
| 16:00 | 81 | EXCELLENT |
| 17:00 | 74 | GOOD |
| 18:00 | 76 | GOOD |
| 19:00 | 79 | GOOD |
| 20:00 | 74 | GOOD |
| 21:00 | 71 | GOOD |
| 22:00 | 69 | GOOD |
| 23:00 | 67 | GOOD |
| 00:00 | 66 | GOOD |
| 01:00 · now | 66 | GOOD |