3 Tree Point - Station #4952
Latitude / Longitude:
47.45° / -122.37°
Elevation:
50 m
Equipment Description:
Raspberry Pi B+, RTL-SDR dongle and off-the-shelf dipole antenna Large Antenna, 2 Sections, 42cm + 2cm is resonant @ ~162 MHz
Current Status & Statistics
| Status | LOW COVERAGE |
| Availability | 97.8% (2082 hours online / 2131 total hours) |
| Reception distance in nautical miles | Average: 1.7 / Max: 1.7 |
| Records received in 1 hour | Distinct Vessels: 4 / Positions: 291 |
| Area Covered | 123 km2 |
Period Statistics
| Period | Availability | Reception Distance | Area Covered |
|---|---|---|---|
| 1 Month | 96.5% | 3 NM | 63.3 km2 |
| 2 Months | 96.8% | 2 NM | 50 km2 |
| 3 Months | 97.8% | 2 NM | 47.6 km2 |
| 6 Months | 97.8% | 6 NM | 157.1 km2 |
| 9 Months | 96.5% | 8 NM | 255.3 km2 |
Ais Message Type Statistics
| Message Type | Count |
|---|---|
| Total Ais Messages | 12.1 |
| MSG 1,2,3 - Position report - Class A | 4.9 |
| MSG 5 – Ship’s Static and Voyage related data | 0.1 |
| MSG 4 – Base Station report | 3.6 |
| MSG 6,8 – Binary messages | 0 |
| MSG 9 – SAR Aircraft position report | 0 |
| MSG 12, 14 – Safety related message | 0 |
| MSG 18 – Class B position report | 0 |
| MSG 19 – Extended Class B report | 0 |
| MSG 24 – Class B Ship’s Static data | 0.1 |
| MSG 21 – Aids-to-Navigation report | 0 |
| MSG 27 – Position report for Long-range applications | 0 |
| Other AIS Messages (AIVD) | 3.4 |
| Other Non-AIS messages | 0 |
| Errors | 0 |
| Inconsistent positions | 0 |