LPFFILES ivo://nasa.heasarc/lpffiles NASA/GSFC HEASARC HEASARC 2026-04-10 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Observation This table provides an index for a time ordered set of files containing the telemetry from the the DRS system on the LISA Pathfinder mission. It gives the time in a variety of spacecraft modes for each file. Note that not all modes were explored during the LISA Pathfinder mission. The Disturbance Reduction System (DRS) was an experiment package aboard the European Space Agency (ESA) LISA Pathfinder spacecraft. LISA Pathfinder (LPF) launched from Kourou, French Guiana, on December 3, 2015. LPF successfully demonstrated the disturbance-free motion of two test masses at a noise level acceptable for a future gravitational wave (GW) observatory. Designated ST7, DRS is the NASA contribution to LPF with the goal of operating disturbance reduction technology in space applicable to GW missions and other future missions with challenging stability requirements. DRS flew two clusters of four, low-noise, colloid micro-thrusters (eight total) and a computer which implemented drag-free control laws. At specific times during the LPF mission, DRS operated as alternative to the ESA provided thrusters and control laws. The location of the test masses relative to the spacecraft and the attitude of the spacecraft were measured by ESA subsystems and provided to DRS as its sensors. The displacement and attitude of the spacecraft relative to the two test masses was controlled using the colloid thrusters and electrostatic forces on the TMs provided by the LPF systems. The key requirements for DRS were to show that the thrust noise was less than 0.1 micro-N, and the spacecraft position noise was less than 10nm/sqrt( Hz) in the measurement frequency band of 1 to 30 micro-Hz. ST7 also recorded the relative acceleration noise (delta-g) between the two test masses, a key metric for the GW application, but had no requirement did not optimize the delta-g performance because this is primarily dependent on the (ESA) inertial sensor. ST7 executed a primary mission in which the thrust noise of the thrusters and the performance of the drag free control were measured and a short extended mission which was used to optimize the performance and expand the operating range of the thrusters and control laws. This table was created by the HEASARC in February 2018 based on data files provided by Jacob Slutsky and Leonid Petrov, which were reformatted from the base files at the LISA Pathfinder archive at ESA. The reformatted data files are available at <a href="https://heasarc.gsfc.nasa.gov/FTP/lpf/data/fits/">https://heasarc.gsfc.nasa.gov/FTP/lpf/data/fits/</a> with summaries of the instrument mode intervals available in summary files in <a href="https://heasarc.gsfc.nasa.gov/FTP/lpf/data/summ/">https://heasarc.gsfc.nasa.gov/FTP/lpf/data/summ/</a>. This is a service provided by NASA HEASARC . https://heasarc.gsfc.nasa.gov/W3Browse/all/lpffiles.html Archive Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=lpffiles GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_lpffiles&Action=More+Options&Action=Parameter+Search&ConeAdd=1 LPF 0.0166666666666667 Optical public lpffiles LISA Pathfinder Archive Data Summary t_tm2_dflf Time in TM2 DFLF Mode s time.duration int nullable t_18dofx Time in 18DOFX Mode s time.duration int nullable t_zg Time in ZG Mode s time.duration int nullable t_cp Time in CP Mode s time.duration int nullable t_tm2_zglf Time in TM2 ZGLF Mode s time.duration int nullable t_att Time in ATT Mode s time.duration int nullable t_init Time in Init Mode s time.duration int nullable t_off Time in Off Mode s time.duration int nullable file_stem Base of the File Name meta.id;meta.main char nullable ontime Total Time in SCI_SCIENCE_1Hz Data s time.duration int nullable end_time End Time for the File mjd time.end double nullable t_tm2_dfllf Time in TM2 DFLLF Mode s time.duration int nullable "__row" System index column char nullable "time" Start Time for the File mjd time.start double nullable t_tm2_18dof Time in TM2 18DOF Mode s time.duration int nullable t_dfhf Time in DFHF Mode s time.duration int nullable t_18dof Time in 18DOF Mode s time.duration int nullable t_zglf Time in ZGLF Mode s time.duration int nullable t_tm2_dfhf Time in TM2 DHFH Mode s time.duration int nullable t_dflf Time in DFLF Mode s time.duration int nullable t_tm2_18dofx Time in TM2 18DOFX Mode s time.duration int nullable t_dfllf Time in DFLLF Mode s time.duration int nullable t_stb Time in STB Mode s time.duration int nullable