AndreaBozzo/ceres-open-data-index huggingface dataset:
ROSETTA-ORBITER 67P RSI 1/2/3
                                     COMET ESCORT 3 0985 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 3 phase 2015-07-01 to 2015-10-21. It is a Global Gravity measurement at the comet 67P and covers the time 2015-08-25T10:12:40.000 to 2015-08-25T16:41:11.000.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     COMET ESCORT 2 0720 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 2 phase 2015-03-11 to 2015-06-30. It is a Global Gravity measurement at the comet 67P and covers the time 2015-04-20T23:13:05.000 to 2015-04-21T07:51:36.500.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     ROSETTA EXTENSION 1 1310 V1.0

This is a Rosetta Radio Science data set, collected during the ROSETTA EXTENSION 1 phase 2016-01-01 to 2016-04-05. It is a Global Gravity measurement at the comet 67P and covers the time 2016-01-03T17:01:55.000 to 2016-01-04T01:15:42.000.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
IRTF NEAR-IR SPECTROSCOPY OF ASTEROIDS V1.0

This data set contains low-resolution, near-infrared (0.8 - 2.5 micron) spectra of asteroids obtained with SpeX at the NASA Infrared Telescope Facility (IRTF) on Mauna Kea. Since it was commissioned in June 2000, SpeX has been the premier instrument for producing high quality near-IR spectra of asteroids. These spectra have been used for both taxonomic studies of asteroids, and for more detailed mineralogical and compositional investigations. This data set archives the reduced, calibrated spectra that have been published in the peer-reviewed literature, and will be regularly updated as more data become publicly available.

Tags: 1014-semphyra, 1020-arcadia, 1039-sonneberga, 1098-hakone, 110-lydia, 1103-sequoia, 112-iphigenia, 1228-scabiosa, 1251-hedera, 1275-cimbria, 1317-silvretta, 1580-betulia, 16-psyche, 1662-hoffmann, 17-thetis, 1858-lobachevskij, 2042-sitarski, 2048-dwornik, 209-dido, 214-aschera, 216-kleopatra, 217-eudora, 234-barbara, 2401-aehlita, 246-asporina, 2501-lohja, 2504-gaviola, 25143-itokawa, 260-huberta, 283-emma, 284-amalia, 289-nenetta, 3103-eger, 317-roxane, 322-phaeo, 3363-bowen, 337-devosa, 3395-jitka, 354-eleonora, 3819-robinson, 387-aquitania, 409-aspasia, 4188-kitezh, 434-hungaria, 44-nysa, 4426-roerich, 446-aeternitas, 46-hestia, 50-virginia, 517-edith, 53-kalypso, 536-merapi, 5840-raybrown, 599-luisa, 64-angelina, 676-melitta, 709-fringilla, 71-niobe, 739-mandeville, 768-struveana, 785-zwetana, 789-lena, 808-merxia, 844-leontina, 847-agnia, 863-benkoela, 87-sylvia, 899-jokaste, 909-ulla, 976-benjamina, 980-anacostia, 984-gretia, asteroid, asteroid-139359, asteroid-26760, asteroid-29075, support-archives
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     COMET ESCORT 4 1197 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 4 phase 2015-10-22 to 2015-12-31. It is a Global Gravity measurement at the comet 67P and covers the time 2015-11-21T07:42:20.000 to 2015-11-21T16:43:24.000.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     PRELANDING 0328 V1.0

This is a Rosetta Radio Science data set, collected during the PRELANDING phase 2014-01-21 to 2014-11-18. It is a Global Gravity measurement at the comet 67P and covers the time 2014-10-01T12:53:55.000 to 2014-10-01T15:55:07.500.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P ROSINA 2
                                      ESC4 V2.0

This data set contains CODMAC level 2 science data acquired by the COPS, DFMS and RTOF ROSINA sensors between 2015-10-20 and 2016-02-09 during the Escort phase 4 of the Rosetta mission at the comet 67P/CG. V2.0 : Some missing DFMS PDS files were added and corrupted files have been removed.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P NAVCAM 2 ROSETTA EXTENSION 2 MTP030 V1.1

This dataset contains ROSETTA NAVCAM RAW DATA of the Extension 2 Phase from 31st May 2016 to 28th June 2016 when at the vicinity of target 67P/CG. This data set V1.1 supersedes the V1.0. It includes updates of the Browse images, clarification of calibration target, document updates and resolve other minor outstanding errata.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, alpha-lyr, bias, international-rosetta-mission, zeta-cas
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER CAL NAVCAM 2 CRUISE 4-2 V1.1

This dataset contains RAW DATA of the Cruise 4-2 Phase from 16 February 2009 until 13 September 2009. This data set V1.1 supersedes the V1.0. It includes updates of the Browse images, adding of the FITS version, clarification of calibration target, document updates and resolve other minor outstanding errata.

Tags: alpha-lyr, alpha-vir, dark-sky, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RPCLAP 2
ESC2 MTP017 V2.0

This data set contains
EDITED data from Rosetta RPC-LAP, acquired during the COMET ESCORT 2
MTP017 mission phase. Comet C-G/67P was the primary target.
This data set supersedes RO-C-RPCLAP-2-ESC2-MTP017-V1.0.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
OrbView-2 SeaWiFS Global Mapped Chlorophyll (CHL) Data, version R2022.0

The SeaWiFS instrument was launched by Orbital Sciences Corporation on the OrbView-2 (a.k.a. SeaStar) satellite in August 1997, and collected data from September 1997 until the end of mission in December 2010. SeaWiFS had 8 spectral bands from 412 to 865 nm. It collected global data at 4 km resolution, and local data (limited onboard storage and direct broadcast) at 1 km. The mission and sensor were optimized for ocean color measurements, with a local noon (descending) equator crossing time orbit, fore-and-aft tilt capability, full dynamic range, and low polarization sensitivity.

Tags: earth-science, ocean-chemistry, ocean-optics, oceans
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER SW RPCMAG 2 PRL RAW V6.0

This dataset contains EDITED RAW DATA (CODMAC LEVEL 2) of the
PRELANDING Phase (PRL) from March 23 until November 21, 2014 of the
ROSETTA orbiter magnetometer RPCMAG. Observations are done in the
vicinity of comet 67P/CHURYUMOV-GERASIMENKO 1 (1969 R1). The current
version of the dataset is V6.0

Tags: 67p-churyumov-gerasimenko-1-1969-r1, checkout, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P OSIWAC 4 PRL-MTP009 RDR V2.0

This CODMAC level 4 data set contains radiometric calibrated and geometric distortion corrected (resampled) image data in W/m^2/sr/nm, acquired by the OSIRIS Wide Angle Camera on the Rosetta spacecraft during the PRELANDING mission phase, covering the period from 2014-10-24T10:00:00.000 to 2014-11-21T23:24:59.000. The prime target is comet 67P/Churyumov-Gerasimenko 1 (1969 R1). This version V2.0 supersedes previous deliveries of the same dataset with the following changes since the last version: Lien corrected dataset after October 2018 PSA/PDS external peer review. Updated documentation and ancillary files, added document on bandpass filter. Updated SCIENCE_USER_GUIDE_V03.PDF to include one section about FAQ and one section about image data quality. Added shutter backtravel and readout issues to image quality map. Updated DATA_QUALITY_ID keyword in image header. Improved handling of images with missing packets.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
VG2 URA LECP RESAMPLED RDR STEPPING
                                      SECTOR 15MIN V1.0

This data set consists of resampled data from the Low Energy Charged Particle (LECP) experiment on Voyager 2 while the spacecraft was in the vicinity of Uranus. This instrument measures the intensities of in-situ charged particles (>26 keV electrons and >30 keV ions) with various  levels of discrimination based on energy, mass species, and angular arrival direction.

Tags: uranus, voyager
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     COMET ESCORT 4 1281 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 4 phase 2015-10-22 to 2015-12-31. It is a Global Gravity measurement at the comet 67P and covers the time 2015-12-24T17:35:00.000 to 2015-12-24T23:57:49.000.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P NAVCAM 2 COMET ESCORT 4 MTP024 V1.1

This dataset contains ROSETTA NAVCAM RAW DATA of the Escort Phase 4 from 15th Dec 2015 to 12th Jan 2016 when at the vicinity of target 67P/CG. This data set V1.1 supersedes the V1.0. It includes updates of the Browse images, clarification of calibration target, document updates and resolve other minor outstanding errata.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, alpha-lyr, bias, international-rosetta-mission, zeta-cas
Organization: National Aeronautics and Space Administration
PHOENIX MARS MECA OPTICAL MICROSCOPE 2 EDR 
                                    VERSION 1.0

The Microscopy, Electrochemistry, and  Conductivity Analyzer (MECA) experiment on the Mars Phoenix Lander  consists of four instrument components plus command electronics. This  MECA Imaging EDR data set contains data from one of the four  MECA components, the Optical Microscope (OM).

Tags: mars, phoenix
Organization: National Aeronautics and Space Administration
Suomi-NPP VIIRS Global Mapped Inherent Optical Properties (IOP) - Near Real-time (NRT) Data, version R2022.0

The Ocean Biology DAAC produces near real-time (quicklook) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Quicklook products provide a snapshot of the data during a short time period within a single orbit.

Tags: biosphere, earth-science, ecosystems, ocean-optics, oceans
Organization: National Aeronautics and Space Administration
MER 1 MI RADIOMETRICALLY CALIBRATED RDR V1.0

This archive volume is one of a set of volumes containing raw and derived data from the Mars Exploration Rover mission. This volume contains "science" data products, which were generated by the instrument team for archiving, as distinguished from "operations" data products, which were generated by the Multi-Mission Image Processing Facility (MIPL) at JPL for using during mission operations. For more information about science vs. operations products, see the text file SCI_VS_OPS.TXT in the DOCUMENT directory.

Tags: mars, mars-exploration-rover
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER/ROSETTA-LANDER CAL CONSERT 3 CR4A V2.0

This archive contains CALIBRATED data (CODMAC level 3) that refers to target CALIBRATION from the CONSERT instrument onboard ROSETTA Orbiter and Lander, acquired during the CR4A phase. In addition to the scientific signal of interest, it contains all the values applied to the signal for calibration. It also contains documentation which describes the CONSERT experiment. The data archived in this data set conform to the Planetary Data System (PDS) Standards, Version 3.6. V2.0 of this dataset includes additional cruise operations which were missing in V1.0.

Tags: calibration, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P OSINAC 4 ESC3-MTP018 RDR V2.0

This CODMAC level 4 data set contains radiometric calibrated and geometric distortion corrected (resampled) image data in W/m^2/sr/nm, acquired by the OSIRIS Narrow Angle Camera on the Rosetta spacecraft during the COMET ESCORT 3 mission phase, covering the period from 2015-06-30T23:25:00.000 to 2015-07-28T23:24:59.000. The prime target is comet 67P/Churyumov-Gerasimenko 1 (1969 R1). This version V2.0 supersedes previous deliveries of the same dataset with the following changes since the last version: Lien corrected dataset after October 2018 PSA/PDS external peer review. Updated documentation and ancillary files, added document on bandpass filter. Updated SCIENCE_USER_GUIDE_V03.PDF to include one section about FAQ and one section about image data quality. Added shutter backtravel and readout issues to image quality map. Updated DATA_QUALITY_ID keyword in image header. Improved handling of images with missing packets.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission, pluto, vega, zeta-cas
Organization: National Aeronautics and Space Administration
Suomi-NPP VIIRS Global Mapped Photosynthetically Available Radiation (PAR) - Near Real Time (NRT) Data, version R2022.0

The Ocean Biology DAAC produces near real-time (quicklook) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Quicklook products provide a snapshot of the data during a short time period within a single orbit.

Tags: earth-science, ocean-optics, oceans
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     PRELANDING 0188 V1.0

This is a Rosetta Radio Science data set, collected during the PRELANDING phase 2014-01-21 to 2014-11-18. It is a Global Gravity measurement at the comet 67P and covers the time 2014-08-08T08:59:30.000 to 2014-08-08T14:00:29.000.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange V007

The Level-4 (L4) carbon product (SPL4CMDL) provides global gridded daily estimates of net ecosystem carbon (CO2) exchange derived using a satellite data based terrestrial carbon flux model informed by the following: Soil Moisture Active Passive (SMAP) L-band microwave observations, land cover and vegetation inputs from the Moderate Resolution Imaging Spectroradiometer (MODIS), Visible Infrared Imaging Radiometer Suite (VIIRS), and the Goddard Earth Observing System Model, Version 5 (GEOS-5) land model assimilation system. Parameters are computed using an Earth-fixed, global cylindrical 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) projection.

Tags: earth-science, land-surface, national-geospatial-data-asset, ngda, soils
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P OSINAC 4 EXT2-MTP030 RDR-STR-REFL V1.0

This CODMAC level 4 data set contains solar stray light corrected, radiometric calibrated and geometric distortion corrected (resampled) image data in in reflectance units (normalized and thus without unit), acquired by the OSIRIS Narrow Angle Camera on the Rosetta spacecraft during the ROSETTA EXTENSION 2 mission phase, covering the period from 2016-05-31T23:25:00.000 to 2016-06-28T23:24:59.000. The prime target is comet 67P/Churyumov-Gerasimenko 1 (1969 R1). This version V1.0 is the first version of this dataset: Lien corrected dataset after October 2018 PSA/PDS external peer review.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
SnowEx Meteorological Station Measurements from Grand Mesa, CO Raw V001

This dataset contains raw meteorological data collected as part of the ongoing the NASA SnowEx mission, from five meteorological stations installed between 2016-2017 in Grand Mesa, Colorado, to provide supporting data for SnowEx field campaigns and forcing data for modeling

Tags: atmosphere, atmospheric-pressure, atmospheric-radiation, atmospheric-temperature, atmospheric-water-vapor, atmospheric-winds, cryosphere, earth-science, land-surface, sensor-characteristics, snow-ice, soils, spectral-engineering
Organization: National Aeronautics and Space Administration
MARS EXPRESS MARS MRS 1/2/3
                                     EXTENDED MISSION 3 3261 V1.0

This is a Mars Express Radio Science data set, collected during the extended mission phase 2010-01-01 to 2012-12-31. It is a Global Gravity measurement and covers the time 2012-06-01T10:43:44.000 to 2012-06-01T13:10:10.500.

Tags: mars, mars-express
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RPCLAP 5
PRL NEL V1.0

This data set contains DERIVED
data from Rosetta RPC-LAP, acquired during the PRELANDING mission phase
where the primary target was the comet 67P/CHURYUMOV-GERASIMENKO 1 (1969
R1). It contains electron density at higher time resolution than in the
DERIV2 data sets.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
NEW HORIZONS
      LEISA PLUTO ENCOUNTER
      CALIBRATED V1.0

This data set contains Calibrated data taken by the New Horizons Linear Etalon Imaging Spectral Array instrument during the Pluto encounter mission phase.  This is VERSION 1.0 of this data set.

Tags: charon, new-horizons, pluto, vega
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P OSINAC 4 EXT1-MTP025 RDR-STRLIGHT V1.0

This CODMAC level 4 data set contains solar stray light corrected, radiometric calibrated and geometric distortion corrected (resampled) image data in W/m^2/sr/nm, acquired by the OSIRIS Narrow Angle Camera on the Rosetta spacecraft during the ROSETTA EXTENSION 1 mission phase, covering the period from 2016-01-12T23:25:00.000 to 2016-02-09T23:24:59.000. The prime target is comet 67P/Churyumov-Gerasimenko 1 (1969 R1). This version V1.0 is the first version of this dataset: Lien corrected dataset after October 2018 PSA/PDS external peer review.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, earth, international-rosetta-mission, vega, zeta-cas
Organization: National Aeronautics and Space Administration
Suomi-NPP VIIRS Global Binned Photosynthetically Available Radiation (PAR) - Near Real Time (NRT) Data, version R2022.0

The Ocean Biology DAAC produces near real-time (quicklook) products using the best-available combination of ancillary data from meteorological and ozone data. As such, the inputs and the calibration used are less than optimal. Quicklook products provide a snapshot of the data during a short time period within a single orbit.

Tags: earth-science, ocean-optics, oceans
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     COMET ESCORT 2 0784 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 2 phase 2015-03-11 to 2015-06-30. It is a Global Gravity measurement at the comet 67P and covers the time 2015-05-17T07:14:10.000 to 2015-05-17T09:12:16.500.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
MEaSUREs Greenland Surface Melt Daily 25km EASE-Grid 2.0 V001

This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, offers users a 25 km daily record of surface/near-surface melting on the Greenland Ice Sheet. The presence of melting is determined from brightness temperature data acquired during a 34 year span by three satellite-borne microwave radiometers: the Scanning Multichannel Microwave Radiometer (SMMR), the Special Sensor Microwave/Imager (SSM/I), and the Special Sensor Microwave Imager/Sounder (SSMIS).

Tags: cryosphere, earth-science, snow-ice, terrestrial-hydrosphere
Organization: National Aeronautics and Space Administration
GO EARTH PLS SUMM EARTH2 ET V1.0

This file is a listing of particle energy spectra from the Galileo Plasma Instrument (PLS) during the second Earth Encounter.  Detector reponses from ion detetors 2P, 4P, and 6P, and from electron detector 4E are available through the PDS as separate files.

Tags: earth, galileo
Organization: National Aeronautics and Space Administration
ULY JUP URAP PLASMA FREQ REC PEAK
                                        E-FIELD 10 MIN

A. UDS data files -------------------- Eight files are provided that conform to the UDS conventions regarding the naming of files and the format of the data. The eight files are divided into 4 pairs of files with each pair consisting of a file containing data averaged over a 10 minute period and a file containing the maximum data value during the same 10 minute period. The 4 pairs of file contain data for the RAR, the PFR, WFA - magnetic field, and WFA - magnetic field.

Tags: jupiter, ulysses
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     COMET ESCORT 3 0872 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 3 phase 2015-07-01 to 2015-10-21. It is a Global Gravity measurement at the comet 67P and covers the time 2015-07-03T03:25:00.000 to 2015-07-03T05:29:13.000.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
ROSETTA-ORBITER 67P RSI 1/2/3
                                     COMET ESCORT 3 1058 V1.0

This is a Rosetta Radio Science data set, collected during the COMET ESCORT 3 phase 2015-07-01 to 2015-10-21. It is a Global Gravity measurement at the comet 67P and covers the time 2015-09-26T03:07:05.000 to 2015-09-26T09:27:17.500.

Tags: 67p-churyumov-gerasimenko-1-1969-r1, international-rosetta-mission
Organization: National Aeronautics and Space Administration
CASSINI SCALAR MAGNETOMETER CALIB DATA V1.0

This data set contains magnetic-field data acquired during the cruise and tour phases of the Cassini mission to Saturn. Data collection began on 16 August (day 228), 1999. On this date, two days before the spacecraft commenced Earth swingby, the magnetometer boom was unfurled into its extended position; a configuration it maintained for the remainder of the mission. This dataset contains the data collected from the helium magnetometer while in scalar mode (SHM). The SHM mode is used only when high fields are expected, this means that SHM data is only collected infrequently and ceased being collected after 17 November (day 321), 2005 due to an instrument failure.

Tags: cassini-huygens, earth, jupiter, saturn, solar-wind, titan, venus
Organization: National Aeronautics and Space Administration
OCO-2 Level 0 spacecraft attitude data V10 (OCO2_Att) at GES DISC

Version 10 is the current version of the data set. Older versions will no longer be available and are superseded by Version 10.

The Orbiting Carbon Observatory is the first NASA missiondesigned to collect space-based measurements of atmospheric carbon dioxidewith the precision, resolution, and coverage needed to characterize theprocesses controlling its buildup in the atmosphere. The OCO-2 project uses the LEOStar-2 spacecraft that carries a single instrument. It incorporates three high-resolution spectrometers that make coincident measurements ofreflected sunlight in the near-infrared CO2 near 1.61 and 2.06 micrometers and inmolecular oxygen (O2) A-Band at 0.76 micrometers . Each band has 1016 spectralelements.This product contains pointing angles of the spacecraft for each orbit.It is generated using the following input data:+ APID 20 telemetry+ Orbit Boundary File.It is essential in generating the Geolocations of the science data.

Tags: earth-science, platform-characteristics, spectral-engineering
Organization: National Aeronautics and Space Administration