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|5535 - RFP - Resolute Bay Fabry-Perot Interf Sp|
Instrument Type: Instrument > OpticalInstrument > Interferometer > FabryPerot
Observation Site: RFP - Resolute Bay Fabry-Perot Interf Sp
Instrument Page: RFPDescription:
The Fabry-Perot Interferometer at Resolute Bay, Canada (74.73N, -94.89E, 87 m ASL) has been operated since 2003 by the High Altitude Observatory of the National Center For Atmospheric Research. The apex magnetic coordinates of Resolute Bay at 250 km height in 2004 were (83.1, -39.0) with a magnetic declination of -24.4 deg, an inclination of 88.0 deg, and 0 UT at 16.31 MLT. The dispersing element of the interferometer is an air-spaced, 10 cm diameter effective clear-aperture Fabry-Perot etalon. It has a fixed gap of 2.0 cm. The etalon is housed in a temperature controlled chamber (Wu et al. 2004). The instrument detector is a back illuminated CCD camera with 1024x1024 pixels and 1x1 inch size. The CCD temperature is set at -55 C. The readout noise of the CCD is 4 electrons. The interferometer has an 8-position filter wheel. The wavelengths used at Resolute Bay are: 1. The red line (630.0 nm, kindat=17001) of atomic oxygen (OI) with a typical emission height peak in the range 210 to 300 km. 2. The green line (557.7 nm, kindat=17002) of atomic oxygen (OI), with a typical emission height peak range near 94-98 km. 3. The [OH] line (892.0 nm, kindat=17003) of the nightglow excited hydroxyl [OH*] with an emission peak between about 87 and 91 km.