Science Keywords>SUN-EARTH INTERACTIONS
Very low frequency subionospheric communication transmitter observations (WWLLN)Entry ID: K060_2008_2012_NZ_1
Abstract: The AARDDVARK/WWLLN Very Low Frequency (VLF) Radio Sensor was installed at Arrival Heights from 10-15 December 2008 by Dr Craig J. Rodger and Dr. James Brundell as part of Antarctica New Zealand Event K069a. The sensor measures the magnetic field in the Very Low Frequency radio range (~500 Hz-50 kHz), and passes it to a PC which processes the data for the experiments. The primary experiment is the ... AARDDVARK observations, which measures powerful and distant communications transmitters operating in the VLF range. As such, the dataset is "narrowband", taking amplitude and phase measurements at the transmission frequencies. For this sensor, there is 0.2s time resolution. The Konsortia sensors detect changes in ionisation levels from ~30-85 km altitude, with the goal of increasing the understanding of energy coupling between the Earth's atmosphere, Sun, and Space. We use the upper atmosphere as a gigantic energetic particle detector to observe and understand changing energy flows; this Science area impacts our knowledge of global change, communications, and navigation. One of the few experimental techniques that can probe these altitudes uses very low-frequency (VLF) electromagnetic radiation, trapped between the lower ionosphere (~85 km) and the Earth, and thus said to be propagating "subionospherically". The sensor is currently logging transmitters in the northern & southern hemispheres, over a very wide longitude range. Both experiments send the processed data across the internet. AARDDVARK observations are sent to the University of Otago once a day at an agreed time. The new AH receiver is the 10th station in the AARDDVARK network, jointly lead by the University of Otago and the British Antarctic Survey.
Start Date: 2008-12-16
Quality Observations are sent to the University of Otago once a day at an agreed time (currently, 1am NZST)
Each participating institute collects and holds its own AARDDVARK data in the form of observations and logs, etc. AARDDVARK members can request selected data periods for scientific study from one another. The exchange of AARDDVARK data between members of the Konsortia is ... undertaken with the goal of specific scientific projects. Data exchange is undertaken with the clear understanding that there will be co-authorship and consultation as to any publications making use of each member's data.
Non-Konsortia members interested in AARDDVARK observations should communicate in the first instance with the AARDDVARK Principal Investigators (Clilverd and Rodger), who can identify which sensors are best suited for your requirements. All interpretation of AARDDVARK data should be undertaken by Konsortia members, who are experts in the understanding of these observations.
Data Set Progress
Phone: +64 03 479 4120
Fax: +64 03 479 0964
Email: crodger at physics.otago.ac.nz
Department of Physics University of Otago PO BOX 56
Country: New Zealand
Role: DIF AUTHOR
Phone: +64 3 358 0200
Fax: +64 3 358 0211
Email: c.poirot at antarcticanz.govt.nz
Antarctica New Zealand Private Bag 4745
Country: New Zealand
Creation and Review Dates
DIF Creation Date: 2009-03-18
Last DIF Revision Date: 2012-06-15