Responsibility of the mission: NASA

Date of launch: August 12th, 2005

End of current mission: (second mission extension)

 

Description

Mars Reconaissance Orbiter (MRO) is the NASA planetary exploration probe, launched in August 2005. It has been operating in the Martian orbit since the end of 2006. The MRO mission is aimed at observing through a global surface mapping (in the visible and near-infrared field), investigating the subsoil, identifying the future landing sites of probes and the future communication and navigation support to Martian mission. One of the main on-board instruments is SHARAD (SHAllow RADar), a radar used to explore the Martian subsoil. The radar is investigating the subsoil in the first hundreds of meters with a vertical resolution of about 20 meters, and a horizontal resolution of about 100 meters, while the perpendicular resolution is in the order of the kilometer based on the characteristics of the local subsoil and surface.

The radar instrument points at the nadir with a pulse setting and two modes of operation: radar and altimeter. In order to isolate the subsoil reflectors, it uses the synthetic aperture techniques. The instrument consists of an antenna and electronic system, operating in a range of wavelengths centered at MHz  +/- 5 MHz. Such configuration allows to analyse the dielectric properties of the subsoil while maintaining a low surface clutter. The selected frequencies are capable of penetrating the ionosphere. The total transmission and reception cycle of every single impulse lasts just a few milliseconds. Subsequently the received signal is down-converted, which means it is converted from analogical to digital and compressed.

 

Scientific goals

The main objective of SHARAD is detecting and mapping, in selected areas, the dielectric interfaces up to a 1-km depth and interpreting the interfaces in geological and geophysical terms. Detecting interfaces in the subsoil is the first step to reconstruct the Martian geology and define the structures and configurations of layers and formations. The frequencies were selected based on the current models of Mars ‘subsoil, with the purpose of detecting the presence of aquifer deposits or layers of ice and studying the structure of polar ice deposits.

 

Italian contribution

The scientific instrument was developed in Italy and provided to the NASA by the ASI as Facility Instrument, with the scientific guidance of a Principal Investigator selected by the ASI following a tender, in the person of Dr. Roberto Seu from the INFOCOM Department of the Sapienza University of Rome. The company in charge of the industrial development is Alenia Spazio, currently Thales Alenia Space, from Rome, which strengthened its know-how in the industry.

 

International agreements

This is the first Italian facility instrument aboard a fully American mission. The ASI participated, with the direct involvement of its personnel, to the delivery and integration stages of the instrument, as well as the launch campaign, based on agreements between the agencies and a Memorandum of Understanding signed on 21/01/2004, which includes also the data management, storage and distribution by the ASI ASDC.

‣ News

THURSDAY 23 MARCH 2023

SPEI SATELLES: A SPACE MISSION TO BRING A MESSAGE OF HOPE TO ALL HUMANITY ‣

The space mission, its genesis, its details and its prospects, will be communicated at 10.30 on 27 March, the third anniversary of the Statio Orbis and the tenth of the pontificate of Pope Francis - Sala Marconi, Piazza Pia 3 Rome MORE...

WEDNESDAY 15 MARCH 2023

ITALIAN PRESIDENT, SERGIO MATTARELLA, VISITS THE “LUIGI BROGLIO” SPACE CENTER IN MALINDI ‣

President Mattarella's first Official Visit to Kenya. Watch the video on AsiTV MORE...

TUESDAY 14 MARCH 2023

The 13th Farinella Prize ‣

The prize is assigned during the EPSC annual meetings MORE...

FRIDAY 03 MARCH 2023

PRISMA in support of the ESA EO Africa initiative ‣

The ASI hyperspectral satellite acquires in Kenya for the HyRELIEF project funded by ESA MORE...

WEDNESDAY 01 MARCH 2023

Agreement between the Italian Ministry of Culture and the Italian Space Agency for heritage study and protection ‣

“Eyes” in space to protect  our national cultural heritage. Cultural heritage data collection kicks off through the COSMO-SkyMed system developed by ASI in cooperation with the Ministry of Defense MORE...