NDACC Header Line

NDACC Ames files contain a header which is used by the database catloging programs to properly place the file in the database tables. The header, originally modeled after the UARS database headers, is a set of fields strung together in a single line. This is the first line of an NDACC Ames file, and is immediately followed by the Ames header. Since the header information is used to catalog the file into the NDACC database, the header spacing is important. Pad all values with blank spaces to the right.

HEADER STRUCTURE

Attribute Format Example List/Details
Investigator 20 bytes PI_SIRNAME I.  
Instrument 12 bytes FTIR Instrument Values
Station 12 bytes REUNION ISL  
Species 12 bytes TOTALCOL Species Values
Data start time * 20 bytes as DD-MON-YEAR HH:MM:SS 01-01-2001 00:00:00  
Data stop time * 20 bytes as DD-MON-YEAR HH:MM:SS 01-31-2001 23:59:59  
Quality Flag ** 4 bytes "0001" Quality Flag

 * Note: For monthly files use the first and last day of the month for start and stop times. For yearly files use the first and last day of the year. For ozonesonde files containing data from one ozonesonde launch use data times.

 

DATA QUALITY FLAG VALUES

The flags consist of 4 digits attached to the end of the NDACC header line as follows:

Flag 1 (1 digit): Data Status
  Value = 0 Data is in its final form and will not change except for major reanalysis
  Value = 1 Data is preliminary; results may change; maybe missing ancillary data;
maybe not reviewed for release by PI
Flag 2 (1 digit): Pointer to additional information
  Value = 0 No additional comments or specific problems
  Value = 1 See notes in the comments section of the Ames file: Severity nominal
  Value = 2 See notes in the metafile: Severity nominal
  Value = 3 See notes in the comments section of the Ames file: Severity important
  Value = 4 See notes in the metafile: Severity important
Flag 3 (2 digits)
  Analysis version number Example: 01, 02, 03.... 10, 11 Value is up to PI

 

INSTRUMENT SPECIES
Header value Filename abbrieviation Header value Filename abbrieviation
BKSONDE   AEROSOL  
AEROSOL_BKS  
BREWER r TOTALCOL tc
DOBSON d TOTALCOL tc
FTIR f TOTALCOL tc
LIDAR l AEROSOL ae
AEROSOL353 a3
AEROSOL355 a4
OZONE o3
TEMP te
TGAS tg
TGAS2 t2
TROPOZONE to
WATERVAPOR ho
MWAVE m CHLORINE cl
CO co
HNO3 hn
N2O n2
OZONE o3
WATERVAPOR ho
O3SONDE   OZONE  
UV/SPECT u UV uv
UV/VIS v TOTALCOL tc