Instruments:Sondre Stromfjord All-Sky Imager

From CedarWiki
Jump to: navigation, search

Sondrestrom All-Sky Imager Listing

All-sky imager (ASI) observations from Sondrestrom are available on the web at http://isr.sri.com/instruments/allsky. The imager operates whenever the solar zenith angle is greater than 105 degrees and the moon is down, regardless of the weather. A complete listing for operational UT hours and sky conditions, as observed in 630.0 nm emission, is summarized in on-line catalogs for each winter since 1999/2000. The URL listed above also archives JPEG renderings of all available raw images, as well as summary MPEG movie loops.

Prior to mid-November 2001, the five position filter wheel was configured to acquire images at (a) 427.8 nm (N2+), (b) 486.2 nm (H-beta protons), (c) 489.5 nm (H-beta background), (d) 630.0 nm (OI), and (e) 732/3 (OII). Most archived patrol data for a given night correspond to 427.8 nm and 630.0 nm images. Subsequent to this date, the H-beta filter was replaced by a wideband red-glass filter to record prompt emission longward of 645 nm and after mid-January 2002, the H-beta background filter was replaced by a 777.4 nm (OI) filter.

The typical patrol operation integrates at 630.0 nm for 15 s, to enhance visibility of polar cap patches and arcs, followed by a 15 to 30 s 427.8 nm integration. This summary list provides UT daynumbers which span the on-line archive of available 630.0 nm images. For further Sondrestrom ASI details, photometric processing, and image interpretation contact Rick Doe (doe@sri.com).


_______________________________________________________________________________________
1999-2000 257-261 269-270 341-354 360-015 017-018 026-029 031-044 053-054 059-072
cont. 084-084 097-097
_______________________________________________________________________________________
2000-2001 270-286 291-315 319-327 331-344 348-348 003-007 011-035 040-049 070-077
cont. 080-089
_______________________________________________________________________________________
2001-2002 256-271 281-302 311-331 339-358 001-025 031-053 059-087 090-099
_______________________________________________________________________________________
2002-2003 247-263 272-285 287-290 292-293 300-322 328-351 356-010 014-015 020-042
cont. 049-070 079-096
_______________________________________________________________________________________
2003-2004 252-252 264-282 290-297 300-311 318-340 346-001 003-004 010-029 031-032
cont. 039-048
_______________________________________________________________________________________
2004-2005 254-260 262-271 280-300 308-317 320-329 336-358 364-020 027-033
_______________________________________________________________________________________
2005-2006 326-343 352-358 016-016 028-030 032-032 034-034 036-036 044-048
_______________________________________________________________________________________