The following text was provided by IDS Co-I, Michael D. Henry, and is included with his permission.  Data set Overview : On Oct 24, 1998, the Deep Space 1 spacecraft was launched as part of the New Millennium Project to test new technology. After the primary mission was completed, the spacecraft encountered comet Borrelly on Sept 22, 2001. The IDS sensors were reprogrammed in flight to collect science data at the comet and the field measurements indicated events associated with dust.  Parameters : The Plasma Wave Antenna (PWA, E-field) and Search Coil Magnetometer (SCM, B-field) sensor channels for the IDS were calibrated with the flight hardware during final thermal testing. The low-frequency E- field and B-field spectrometer channels are based on voltage- controlled fourth-order band-pass filters with constant Q.  Calibration signals were injected into the PWA dipole antenna leads at the pre-amp and the external SCM channel inputs. The calibration activity described herein was intended to characterize the center frequency, bandwidth and sensitivity of the IDS spectrometer channels.  Calibration : The IDS spectrometer channel calibration was performed over the operating temperature range of -25C to 50C. At elevated temperatures (>40C), internal oscillation was observed at 400-700 Hz frequency in the board (spectrometer). Fortunately, this board remained below 25C throughout most of the DS1 mission, and was approximately 15C during the Borrelly encounter. Little temperature sensitivity was observed at calibration over the temperature range -25C to 25C, thus only the 25C calibration data was analyzed to produce the engineering unit conversion for the spectrometer channels.  Processing : The PWA pre-amplifier was separately characterized with the frequency response determined to be flat between 200Hz and 300 MHz. The voltage-controlled gain was determined using an input signal at 1 KHz and varying the gain voltage over the operating range.  The SCM sensor was characterized to provide volts/Tesla response over the nominal frequency range of 7 Hz to 25.6 KHz.  Characterization of the spectrometer channels was performed by injecting sinusoidal signals of known frequency and amplitude into the spectrometer. For frequency response characterization, the input amplitude was held constant (50 mV peak-to-peak) and the frequency was varied stepwise from 1 to 50 MHz in logarithmic fashion. A few channels were characterized with higher frequency resolution to verify the response of the tunable band-pass circuit. The frequency characterization data for Channel 7 (E-field, 780 Hz) is accurately fit by a fourth-order band-pass filter response function.  Coordinate Systems : No coordinate is specified for the IDS data.  Software : The parsing software to reduce IDS data is not provided with the archive; it was upgraded in 2003.  Media/Format : The standard distribution format for the data is an electronic volume.

Confidence Level Overview : The high frequency filters for the E-field data are overlapping and can lead to cross talk which has been accounted for in the archive products.  A significant effort was made in 2003 to upgrade the calibration values to prepare the data set for review. Previously published data is not as that presented to the PDS in 2003.