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| header_id | int | 4 | header index | False |
| pointing_id | int | 4 | unique pointing identifier | False |
| beam_id | tinyint | 1 | beam number for each pointing; range is [0-6] | False |
| version_id | smallint | 2 | incrementing version counter for data reprocessing | False |
| original_wapp_file | varchar | 200 | original WAPP filename | False |
| sample_time | float | 8 | sample time (useconds) | False |
| observation_time | float | 8 | observation time (seconds) | False |
| timestamp_mjd | float | 8 | MJD timestamp | False |
| num_samples_per_record | smallint | 2 | number of samples/record | False |
| center_freq | float | 8 | band center frequency (Mhz) | False |
| channel_band | float | 8 | channel band (kHz) | False |
| num_channels_per_record | smallint | 2 | number of channels/record | False |
| num_ifs | smallint | 2 | number of input frequencies | False |
| right_ascension | float | 8 | right ascension J2000 HMS (10000*hr + 100*min + sec) | False |
| declination | float | 8 | declination J2000 DMS (10000*deg + 100*min + sec) | False |
| galactic_longitude | float | 8 | galactic longitude (degrees) | False |
| galactic_latitude | float | 8 | galactic latitude (degrees) | False |
| source_name | nvarchar | 100 | source/pointing name | False |
| lag_format | tinyint | 1 | lag format | False |
| sum_id | tinyint | 1 | 1 = data is sum of IFs | False |
| level_id | tinyint | 1 | 1 = 3-level; 2 = 9-level | False |
| start_az | float | 8 | telescope azimuth at the start of the scan (deg) | False |
| start_za | float | 8 | telescope zenith angle at the start of the scan (deg) | False |
| start_ast | float | 8 | apparent solar time at the start of the scan (sec) | False |
| start_lst | float | 8 | local siderial time at the start of the scan (sec) | False |
| project_id | nvarchar | 40 | AO proposal number (XYYYY) | False |
| observers | nvarchar | 100 | name(s) of observer(s) | False |
| file_size | int | 4 | file size (bytes) | False |
| data_size | int | 4 | data size (bytes) | False |
| num_samples | int | 4 | number of samples | False |
| pointing_prefix | varchar | 200 | prefix that identifies each pointing | False |
| HTM_id | bigint | 8 | hierarchical triangular mesh spatial index number | True |
| ra_deg | float | 8 | right ascension J2000 in degrees | True |
| dec_deg | float | 8 | declination J2000 in degrees | True |