A dataset provided by the European Space Agency

URL https://archives.esac.esa.int/psa/ftp//pub/mirror/MARS-EXPRESS/MARSIS/MEX-M-MARSIS-2-EDR-EXT3-V1.0
DOI https://doi.org/10.5270/esa-h0i8z48
Abstract This dataset contains the scientific telemetry produced by the MARSIS instrument after editing for duplicated and corrupted packets, together with geometric information computed on ground to locate observations in space and time. Both subsurface and ionosphere sounding data are included in the dataset.
Description Data Set Overview = MARSIS Level 1b data products consist of the data produced by the instrument reconstructed from the scientific telemetry, sorted by instrument state and data type, and provided with spacecraft position, velocity and attitude information. Parameters MARSIS data are organized into groups of echoes called frames. A frame contains one or more echoes, with or without on-board processing. Each echo, depending on the kind of processing it underwent, is recorded either as a time series of signal samples, or as the complex spectrum of the signal itself produced by means of a FFT. Scientific data in a frame are complemented by a set of ancillary data, produced by the instrument and recording parameter values used in pulse transmission, echo reception and on-board processing. Processing Level 1b processing starts by cleaning, merging and time-ordering the packets. Duplicate data are deleted, missing packets are padded out, and the data are organised by orbits. Data are then sorted by instrument data types and instrument modes, and provided with spacecraft position, velocity and attitude information. MARSIS Level 1b processing orders data in a useful way for the intended users (i.e. radar scientists) and applications (i.e. quick look to monitor hardware performance and higher-level processing), altering and manipulating them as little as possible to avoid the risk of introducing errors and, at the same time, including all necessary information from all r^ant sources. Level 1b data are in scientifically useful form, i.e. individual spectra, but they are uncalibrated. Data The list of EDR data Products is: E_AIS Active Ionosphere Sounding data frames with geometry information E_CAL Data frames acquired in Calibration mode with geometry information E_RXO Data frames acquired in Receive Only mode with geometry information E_SSx_ACQ_CMP On-board-processed Subsurface Sound...
Instrument MARSIS
Temporal Coverage 2009-05-01T00:00:00Z/2012-12-31T00:00:00Z
Version V1.0
Mission Description Mission Overview Mars Express was the first flexible mission of the revised long-term ESA Science Programme Horizons 2000 and was launched to the planet Mars from Baikonur (Kazakhstan) on June 2nd 2003. A Soyuz-Fregat launcher injected the Mars Express total mass of about 1200 kg into Mars transfer orbit. Details about the mission launch sequence and profile can be obtained from the Mission Plan (MEX-MMT-RP-0221) and from the Consolidated Report on Mission Analysis (CREMA)(MEX-ESC-RP- 5500). The mission consisted of (i) a 3-axis stabilized orbiter with a fixed high-gain antenna and body-mounted instruments, and (ii) a lander named BEAGLE-2, and was dedicated to the orbital and in-situ study of the interior, subsurface, surface and atmosphere of the planet. After ejection of a small lander on 18 December 2003 and Mars orbit insertion (MOI) on 25 December 2003, the orbiter experiments began the acquisition of scientific data from Mars and its environment in a polar elliptical orbit. The nominal mission lifetime for the orbiter was 687 days following Mars orbit insertion, starting after a 5 months cruise. The nominal science phase was extended (tbc) for another Martian year in order to complement earlier observations and allow data relay communications for various potential Mars landers up to 2008, provided that the spacecraft resources permit it. The Mars Express spacecraft represented the core of the mission, being scientifically justified on its own by investigations such as high- resolution imaging and mineralogical mapping of the surface, radar sounding of the subsurface structure down to the permafrost, precise determination of the atmospheric circulation and composition, and study of the interaction of the atmosphere with the interplanetary medium. The broad scientific objectives of the orbiter payload are briefly listed thereafter and are given more extensively in the experiment publications con...
Creator Contact ROBERTO OROSEI
Date Published 2016-10-01T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2016-10-01T00:00:00Z, MEX-M-MARSIS-2-EDR-EXT3, V1.0. https://doi.org/10.5270/esa-h0i8z48