ACTIVE NITROGEN PARTITIONING AND THE NIGHTTIME FORMATION OF N2O5 IN THE STRATOSPHERE - SIMULTANEOUS INSITU MEASUREMENTS OF NO, NO2, HNO3, O-3, AND N2O USING THE BLISS DIODE-LASER SPECTROMETER - WEBSTER, CR; MAY, RD; TOUMI, R; PYLE, JA (JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1990)