A five-channel cavity ring-down spectrometer for the detection of NO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;, NO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;, N&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;5&amp;lt;/sub&amp;gt;, total peroxy nitrates and total alkyl nitrates
Atmospheric measurement techniques