| chip | Chip | Information about the chip | | instr.det meta.id |
| creation_date | datetime | Date this object was created | | time.epoch |
| instrument | Instrument | Information about the instrument | | instr.obsty |
| is_valid | int | Manual/external flag to disqualify bad data (SuperFlag) | | meta.code |
| mean_diff | float | The mean difference between biases | ADU | stat.mean |
| median_diff | float | The median difference between biases | ADU | stat |
| observing_block | ObservingBlock | Information about the observing block | | |
| process_params | ReadNoiseParameters | Processing parameters | | |
| process_status | int | A flag indicating the processing status | | meta.code |
| quality_flags | int | Automatic/internal quality flag | | meta.code |
| raw_bias_frames | RawBiasFrame | The RawBiasFrames used to do the measurement | | |
| read_noise | float | The read noise measurement | ADU | instr.sensitivity |
| template | Template | Information about the template | | |
| timestamp_end | datetime | End of valid period | | time |
| timestamp_start | datetime | Start of valid period | | time |
