Jan Mayen seismometer station JNW/Liberg: Upgrades July / August 2018. Click photos to enlarge.
- Station personell removed old instrument cabin and installed new in July 2018. Thanks a lot for the assistance!
- Upgrades consisted of:
- New windgenerator, from manufacturer Superwind, model number SW-353.
Our engineering considerations regarding wind generators are documented here.
- New solar panel, model "MaxPower" 160 Watt, with dimensions W x D x H =
1470 x 660 x 50 mm, weight: 12.5 kg, installed in a metal frame. "As built" documentation on solar power system is here.
- New 2.4 GHz WLAN telemetry system, documented here.
- Adding new class of instrumentation: Geodetic GNSS receiver, Trimble model NetR9.
Antenna installed temporarily on instrument cabin itself (which is not satisfactory). Found new location for permanent antenna placement - adjacent to existing sensor vault, approx 1 km from instrument cabin.
Permanent antenna on short mast will most likely be installed in summer 2019.
- New seismometer system, supplied by Canadian company Nanometrics:
- Sensor, 3-component broadband type, model Trillium 120QA Vault.
Sensor will later be installed in pipe with inner diameter 295 mm, 1 meter depth, in center of vault.
- Digitizer, model Centaur, 3 channel version,
- GPS antenna connected to digitizer (for time-stamping purposes) is a model designed for marine use, suitable for the harsh climate conditions on Jan Mayen:
Mfr: SANAV - San Jose Technology, Inc. model number GA-88P.
- Preparations are made for later installation of Iridium based reset unit -- Xeos Technologies model XI-202 --
so we can do remote power cycling if there are instrumentation or telemetry hang-ups.
Iridium antenna is mounted on stainless steel pipe, 1 m Long, 26.4mm Nominal Outer Diameter, 3/4 inch BSPT connection (supplier RS Components P/N: 190-844) --
not perfectly matching threading of antenna, but good enough.
- Sensor pit and instrument cabin is separated by a distance of approx 1 km. There is an old two-pair cable running between these two sites.
We used that cable to feed 48 Vdc into sensor vault and - with Ethernet Extenders - also forwarded TCP/IP network to vault.
Since 1 km cable seemed fine, we can continue to use this sensor vault in the future.
- Outer layer of sensor plywood box, made in 1984, is worn and in parts show signs of deteriation.
We consider cladding it with thin sheets of Aluminum, of alloy 5754
which has high corrosion resistance, with spacing for ventilation. These Aluminum sheets can be delivered with additional surface treatment, even anodized with desired color (which is NCS "S 0580-Y").