A dataset provided by the European Space Agency

Name CH1ORB-L-SARA-2-NPO-EDR-CENA
Mission CHANDRAYAAN-1
URL ftp://psa.esac.esa.int/pub/mirror/pub/mirror/CHANDRAYAAN-1/SARA/CH1ORB-L-SARA-2-NPO-EDR-CENA-V1.0
DOI https://doi.org/10.5270/esa-1i7js7s
Abstract This dataset contains the RAW data from the CENA sensor of the SARA instrument from the NPO of the CHANDRAYAAN-1 mission.
Description Contents 1 Data set description 1.1 Data set overview 1.2 Parameters 1.3 Processing 1.4 Data 1.5 Ancillary data 1.6 Software 1.7 Media/Format 2 Confidence level note 2.1 Confidence level overview 2.2 Review 2.3 Data quality 1. Data set description 1.1. Data set overview The output data of CENA sensor is basically neutral particle counts.CENA sensor operates in 3 instrument modes (coincidence Mode, counter M ode and Engineering Mode) and the content of the data coming from the CENA sensor is dependent on the instrument mode and the format of the data depends on the telemetry mode. The telemetry modes are Mass Accumulation Mode, TOF Accumulation Mode and Count Accumulation Mode.In Mass accumulation mode, TOF accumulation mode and Count accumulation mode, data coming from the sensor is being sorted by look-up tables and is being summed up into two types of accumulation matrixes (the accumulation matrix and the accumulation scaling matrix) during a time period. The accumulation matrix size changes depending on the binning parameters (energy, channel, phase and mass bins).For details on the CENA sensor of the SARA experiment and the data products, see the EAICD in the `DOCUMENT' directory. 1.2. Parameters The measured parameter is basically raw neutral particle counts. 1.3. Processing No processing beyond unpacking has been applied to the telemetry data. 1.4. Data Each data product contains all data from one orbit. The data product contain housekeeping data as well as science data as scaling matrix(total counts) and accumulation matrix except for the counter mode operation of CENA where there will be no scaling matrix.The instrument mode and telemetry mode is reflected in the file name (refer to the EAICD in the DOCUMENT directory).CENA data is archived using the storage format of PDS ARRAY of COLLECTION objects.Each CENA PDS data product f ile contains an ARRAY of records of CENA measurements in one orbit. Ea ch record i...
Instrument SARA
Temporal Coverage 2008-12-08T11:32:57Z/2009-08-13T23:41:56Z
Version V1.0
Mission Description Mission Overview Chandrayaan-1, the first Indian mission to Moon, was designed to carry out high resolution remote sensing studies of the Moon to further our understanding about its origin and evolution. Chandrayaan-1 was launched on October 22, 2008 by PSLV-C11 at 00:52 UT from SDSC, SHAR. The lift-off and dry mass break-up is as follows: Lift-off mass : 1380 kg Dry mass : 560 kg Propellant mass : 818.2 kg Pressurant mass : 2.84 kg The launch of the spacecraft was planned such that the Moon is at one of its nodes when the Spacecraft arrives there. In order to have multiple launch opportunities every month and to contain burn errors, the phasing loop strategy with multiple loops and five Earth bound maneuvers is adopted. The injection parameters are as follows: Semimajor axis : 17971.73 km Eccentricity : 0.63094 Inclination : 17.9112 deg Perigee height : 254.457 km Apogee height : 22932.741 km The details of five Earth bound manuevers, lunar insertion manuever and circularization manuevers are given below: ..-------------------------------------------------------------------------------------. | BURN | CENTRAL BODY | Perigee No | deltaV(m/s) | Dur (S) | Post Manuever orbit | | | | | | | prg X apg (km) | ..--------|--------------|-------------|-----------------------------------------------. | | | | | | | | EBN #1 | Earth | 4 | 344.43 | | 299.2 X 37908.1 | | | | | | | | | EBN #2 | Earth | 8 | 328.14 | 912.36 | 336.3 X 74715.6 | | | | | | | | | EBN #3 | Earth | 9 | 221.69 | 567.73 | 347.8 X 165015.1 | | | | | | | | | EBN #4 | Earth | 10 | 77.17 | 192.18 | 459.4 X 266612.9 | | | | | | | | | EBN #5 | Earth | 11 | 60.70 | 147.68 | 972.8 X 379859.2 | | | | | | | | | TCM | Earth | | 0.82 | 5.59 | 802.8 X 378499.2 | ..--------|--------------|-------------|-----------------------------------------------. | | | | | | | | LOI | Moon | - | 366.96 | 817.07 | 507.9 X 7510.1 | | | | | | | | | LBN #1 | Moon | - | 26...
Creator Contact ANIL BHARDWAJ/STAS BARABASH
Date Published 2010-03-31
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2010-03-31, CH1ORB-L-SARA-2-NPO-EDR-CENA, V1.0. https://doi.org/10.5270/esa-1i7js7s