swept-frequency sounder
1Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …
2ALSE — The ALSE (Apollo Lunar Sounder Experiment) (also known as Scientific Experiment S 209, according to NASA designations) was a ground penetrating radar (subsurface sounder) experiment that flew on the Apollo 17 mission. Mission and Science This… …
3Russia — /rush euh/, n. 1. Also called Russian Empire. Russian, Rossiya. a former empire in E Europe and N and W Asia: overthrown by the Russian Revolution 1917. Cap.: St. Petersburg (1703 1917). 2. See Union of Soviet Socialist Republics. 3. See Russian… …
4Italy — /it l ee/, n. a republic in S Europe, comprising a peninsula S of the Alps, and Sicily, Sardinia, Elba, and other smaller islands: a kingdom 1870 1946. 57,534,088; 116,294 sq. mi. (301,200 sq. km). Cap.: Rome. Italian, Italia. * * * Italy… …
5ancient Rome — ▪ ancient state, Europe, Africa, and Asia Introduction the state centred on the city of Rome. This article discusses the period from the founding of the city and the regal period, which began in 753 BC, through the events leading to the… …
6telegraph — telegrapher /teuh leg reuh feuhr/; esp. Brit., telegraphist, n. /tel i graf , grahf /, n. 1. an apparatus, system, or process for transmitting messages or signals to a distant place, esp. by means of an electric device consisting essentially of a …
7Mars Express — CG image of Mars Express Operator ESA Mission type Orbiter + Lander Satellite of …
