@proceedings {703,
	title = {Observing Auroral Radio Emissions in Conjugate Hemispheres},
	year = {2023},
	month = {03/2023},
	publisher = {HamSCI},
	address = {Scranton, PA},
	abstract = {<p>In addition to its beautiful optical displays, the aurora produces radio emissions of various types, including cyclotron harmonic emissions, auroral hiss, medium frequency burst (MFB), and auroral kilometric radiation (AKR). These emissions enable remote sensing of ionospheric processes and provide a natural laboratory for studying physics of radio emissions that also occur in planetary, solar, and astrophysical environments. Similar to the optical aurora, these radio emissions are generated separately in the northern and southern hemispheres. Nevertheless, optical aurora sometimes exhibit similar features simultaneously in the two hemispheres because aurora in both hemispheres are ultimately driven by the interaction between the solar wind and the magnetosphere. The same should be true of radio emission. At very low frequencies (VLF), auroral hiss has previously been detected at conjugate observatories in Iceland and Antarctica, and satellite-borne radio receivers have observed AKR simultaneously emanating from conjugate sources; however, the other types of radio emission have never been studied at both ends of a magnetic field line. To accomplish this, LF/MF/HF radio receivers have recently been installed at Qikiktarjuaq and Iqaluit, Nunavut, observatories of the Canadian High Arctic Ionospheric Network (CHAIN) which straddle the nominal magnetic conjugate point of South Pole Station, Antarctica, where Dartmouth College operates LF/MF/HF receivers. The Arctic observations employ a dedicated 10-m^2 magnetic loop antenna with active preamp, and a feed from the horizontal linear dipole antennas used for reception of CHAIN ionosonde signals. The Antarctic observations use magnetic loops of areas 2.5-40 m^2 depending on frequency range. Both systems have collected data since October, 2022. Conjugate auroral hiss events have been detected in both equinoctial and solstice conditions. In the latter case, the hiss observed in the daylit hemisphere was weaker than that in the dark ionosphere. Based on initial data, the characteristics and seasonal dependence of conjugate LF auroral hiss appears consistent with previous observations at VLF. Many hiss and cyclotron harmonic emissions have been observed in one hemisphere but not the other. Upcoming 2023 Spring equinox will bring a period of simultaneous darkness at South Pole and Qikiktarjuaq ideal for conjugate medium frequency burst and cyclotron harmonic emissions.</p>
},
	author = {James LaBelle and David McGaw and T. Kovacs and A. Kashcheyev and P.T. Jayachandran}
}
@conference {385,
	title = {A new CHAIN site in New Brunswick: low-cost HF and GNSS instruments for Solar Eclipse 2024},
	booktitle = {HamSCI Workshop 2020},
	year = {2020},
	month = {03/2020},
	publisher = {HamSCI},
	organization = {HamSCI},
	address = {Scranton, PA},
	abstract = {<p>The Canadian High Arctic Ionospheric Network (CHAIN) is an array of ground-based radio instruments deployed in the Canadian Arctic and operated by the University of New Brunswick. The network consists of 25 GISTMs/GPS receivers and 9 ionosondes located in Canada at high geographic latitudes spanning between 56{\textdegree} and 80{\textdegree} and has been expanded recently with a new mid-latitude station in New Brunswick, Canada. The coordinates of the new station (Blissville, 45.6 N, 66.54 W) make the station an ideal location to host space weather instrumentation for study of the Solar Eclipse 2024. The predicted path of the total solar eclipse is passing through the site. The Blissville station is equipped with a range of scientific grade instruments, including a multi-constellation GNSS scintillation monitor and CADI ionosonde. Likewise, this station is hosting a low-cost, low-power HF-radar and a low-cost dual frequency GNSS receiver. The ongoing tests are showing good performance with room for potential improvements of the low-cost devices with respect to the citizen science applications. The results of the data comparison of the scientific grade and low-cost space weather instruments will be presented. Possibilities for collaboration with amateur radio community will be discussed.</p>
},
	author = {A. Farnham and A. Kashcheyev and T. Kelly and P. T. Jayachandran}
}
