Solar Dynamics Observatory: differenze tra le versioni

Versione delle 19:19, 2 ott 2008

Versione delle 19:23, 2 ott 2008

Riga 19:

== Durata della missione ==

Il lancio della missione è previsto per il [[26 gennaio]] [[2010]] tramite un vettore [[Atlas V]];<ref name="SDO"/> attualmente la sonda è in fase di test nell'edificio 7 del [[Goddard Space Flight Center]] della NASA, sito in [[Greenbelt]], [[Maryland]]. La missione dovrebbe durare cinque anni e tre mesi, ma non se ne esclude un prolungamento ad almeno dieci anni. Alcuni considerano il Solar Dynamic Observatory come il successore del [[Solar and Heliospheric Observatory]] (SOHO).

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== Caratteristiche ==

=== Comunicazioni ===

SDO will downlink science data (Ka-band) from its two onboard high-gain antennas, and engineering data (S-band) from its two onboard omni-directional antennas. The ground station consists of two dedicated (redundant) 18-meter radio antennas in [[White Sands Missile Range|White Sands]], New Mexico. The antennas will be constructed specifically for SDO. The combined data rate will be about 130 Mbit/s (150 Mbit/s with overhead, or 300 Mbit/s 2:1 convolutinally encoded). SDO will generate approximately 1.5 Terabytes of data per day.

SDO will periodically use the [http://www.uspacenetwork.com/ Universal Space Network] antenna at South Point, Hawaii to provide additional tracking resolution. Mission controllers will operate the spacecraft remotely from the Mission Operations Center at [[NASA]]'s [[GSFC]].

=== Launch vehicle ===

The launch vehicle is an [[Atlas V]] rocket. SDO will launch from [[NASA]]'s [[Kennedy Space Center]] ([http://www.ksc.nasa.gov/ KSC]). The initial perigee will be about 2500 km, after which SDO will undergo a series of orbit-raising maneuvers until the nominal orbit is reached.

Riga 36 ⟶ 31:

SDO will orbit at 36,000 km in a circular [[geosynchronous orbit]] at 102° W longitude inclined at 28.5°.

== Science instrumentsComunicazioni ==

SDO will downlink science data (Ka-band) from its two onboard high-gain antennas, and engineering data (S-band) from its two onboard omni-directional antennas. The ground station consists of two dedicated (redundant) 18-meter radio antennas in [[White Sands Missile Range|White Sands]], New Mexico. The antennas will be constructed specifically for SDO. The combined data rate will be about 130 Mbit/s (150 Mbit/s with overhead, or 300 Mbit/s 2:1 convolutinally encoded). SDO will generate approximately 1.5 Terabytes of data per day.

SDO will periodically use the [http://www.uspacenetwork.com/ Universal Space Network] antenna at South Point, Hawaii to provide additional tracking resolution. Mission controllers will operate the spacecraft remotely from the Mission Operations Center at [[NASA]]'s [[GSFC]].

== Strumentazione scientifica ==

The science instruments on SDO are:

* The Extreme Ultraviolet Variability Experiment: The [http://lasp.colorado.edu/eve/ Extreme Ultraviolet Variability Experiment (EVE)], led from the [http://www.colorado.edu/ University of Colorado's] [http://lasp.colorado.edu/ Laboratory for Atmospheric and Space Physics] ([[LASP]]) in Boulder, CO, measures the solar EUV irradiance with unprecedented spectral resolution, temporal cadence, accuracy, and precision.

===The Extreme Ultraviolet Variability Experiment===

The [http://lasp.colorado.edu/eve/ Extreme Ultraviolet Variability Experiment (EVE)], led from the [http://www.colorado.edu/ University of Colorado's] [http://lasp.colorado.edu/ Laboratory for Atmospheric and Space Physics] ([[LASP]]) in Boulder, CO, measures the solar EUV irradiance with unprecedented spectral resolution, temporal cadence, accuracy, and precision.

* The Helioseismic and Magnetic Imager: The [http://hmi.stanford.edu/ Helioseismic and Magnetic Imager (HMI)], led from [[Stanford University]] in Stanford, CA, studies solar variability and characterizes the Sun’s interior and the various components of magnetic activity.

===The Helioseismic and Magnetic Imager===

The [http://hmi.stanford.edu/ Helioseismic and Magnetic Imager (HMI)], led from [[Stanford University]] in Stanford, CA, studies solar variability and characterizes the Sun’s interior and the various components of magnetic activity.

* The Atmospheric Imaging Assembly: The [http://aia.lmsal.com/ Atmospheric Imaging Assembly (AIA)], led from the [http://www.lmsal.com/ Lockheed Martin Solar and Astrophysics Laboratory] ([[LMSAL]]), provides full-disk imaging of the Sun in several ultraviolet and Extreme-Ultraviolet (EUV) band passes at high spatial and temporal resolution.

===The Atmospheric Imaging Assembly===

The [http://aia.lmsal.com/ Atmospheric Imaging Assembly (AIA)], led from the [http://www.lmsal.com/ Lockheed Martin Solar and Astrophysics Laboratory] ([[LMSAL]]), provides full-disk imaging of the Sun in several ultraviolet and Extreme-Ultraviolet (EUV) band passes at high spatial and temporal resolution.

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== Note ==