SGP/ACSM/C1 - missing data

Data are missing for the specified periods because of instrument problems.  Data for the 
period from the end of May through end of September are missing because of the failure of 
two turbo pumps and the return of the instrument to the manufacturer for service.

• -180.0 - +180.0(alt)
• Mass to charge ratios of ion fragments(amus)
• Mass concentration of ammonium, ambient aerosol in air(ammonium)
• time_in_seconds_since_volume_start(time)
• Mass concentration of sulfate, ambient aerosol in air.(sulfate)
• Mass concentration of nitrate, ambient aerosol in air(nitrate)
• North Latitude(lat)
• Mass concentration of total organics, ambient aerosol in air(total_organics)
• Time offset from base_time(time_offset)
• lon(lon)
• Mass concentration of chloride, ambient aerosol in air.(chloride)
• Organic mass spectral matrix(org_mx)
• base time in epoch(base_time)
• Organic mass spectral error matrix(org_mx_err)

• Mass concentration of total organics, ambient aerosol in air(total_organics)
• time_in_seconds_since_volume_start(time)
• Mass concentration of chloride, ambient aerosol in air.(chloride)
• Mass concentration of sulfate, ambient aerosol in air.(sulfate)
• lon(lon)
• Mass concentration of nitrate, ambient aerosol in air(nitrate)
• base time in epoch(base_time)
• Time offset from base_time(time_offset)
• North Latitude(lat)
• -180.0 - +180.0(alt)
• Mass concentration of ammonium, ambient aerosol in air(ammonium)

• lon(lon)
• Organic mass spectral matrix(org_mx)
• Mass concentration of sulfate, ambient aerosol in air.(sulfate)
• Mass concentration of nitrate, ambient aerosol in air(nitrate)
• Mass concentration of ammonium, ambient aerosol in air(ammonium)
• Time offset from base_time(time_offset)
• Mass concentration of total organics, ambient aerosol in air(total_organics)
• time_in_seconds_since_volume_start(time)
• -180.0 - +180.0(alt)
• Mass to charge ratios of ion fragments(amus)
• North Latitude(lat)
• base time in epoch(base_time)
• Mass concentration of chloride, ambient aerosol in air.(chloride)
• Organic mass spectral error matrix(org_mx_err)