English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

ASTROD I is the first planned space mission in a series of ASTROD missionsfor testing relativity in space using optical devices. The main aims are: (i)to test General Relativity with an improvement of three orders of magnitudecompared to current results, (ii) to measure solar and solar system parameterswith improved accuracy, (iii) to test the constancy of the gravitationalconstant and in general to get a deeper understanding of gravity. The firstideas for the ASTROD missions go back to the last century when new technologiesin the area of laser physics and time measurement began to appear on thehorizon. ASTROD is a mission concept that is supported by a broad internationalcommunity covering the areas of space technology, fundamental physics, highperformance laser and clock technology and drag free control. While ASTROD I isa single-spacecraft concept that performes measurements with pulsed laserranging between the spacecraft and earthbound laser ranging stations, ASTROD-GWis planned to be a three spacecraft mission with inter-spacecraft laserranging. ASTROD-GW would be able to detect gravitational waves at frequenciesbelow the eLISA/NGO bandwidth. As a third step Super-ASTROD with larger orbitscould even probe primordial gravitational waves. This article gives an overviewon the basic principles especially for ASTROD I.

Astrodynamical Space Test of Relativity using Optical Devices I (ASTROD I) - Mission Overview