observation period

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• Observation tower — in Auersberg, Saxony, Germany. An observation tower is a structure used to view events from a long distance and to create a full 360 degree range of vision. They are usually at least 20 metres (65.6 ft) tall and made from stone, iron, and… …   Wikipedia

• Observation Tower Height of Goetzingen — is a 25 metres tall observation tower on Height of Goetzingen near Neustadt in Saxony. Observation Tower Height of Goetzingen was built in 1883 together with an inn in its proximity. Therefore it is older than Eiffel Tower and one of the oldest… …   Wikipedia

• Observation Post Alpha — Contemporary border fence and NATO observation tower monument, near Rasdorf, Germany. Observation Post Alpha, OP Alpha or Point Alpha ( …   Wikipedia

• observation — ob|ser|va|tion W3 [ˌɔbzəˈveıʃən US ˌa:bzər ] n 1.) [U and C] the process of watching something or someone carefully for a period of time observation of ▪ Bloomfield s approach to linguistics was based on observation of the language. ▪ He spent… …   Dictionary of contemporary English

• observation — noun 1 (C, U) the process of watching something or someone carefully for a period of time: a study based on detailed observation of a group of 20 patients | a result of scientific observation | under observation (=being watched continuously by… …   Longman dictionary of contemporary English

• observation station — noun a station set up for making observations of something • Hypernyms: ↑station • Hyponyms: ↑sampling station, ↑sampler * * * observation station, 1. a place from which to observe and report what is happening nearby: »... to stop all nuclear… …   Useful english dictionary

• observation twilight — That part of the twilight period during which the horizon may be observed as a sharply defined line and the navigational stars may be seen. The light diffused during this period. For computation purposes, this twilight begins or ends when the… …   Aviation dictionary

• Participant observation — is a set of research strategies which aim to gain a close and intimate familiarity with a given group of individuals (such as a religious, occupational, or subcultural group, or a particular community) and their practices through an intensive… …   Wikipedia

• Surface weather observation — Surface weather observations are the fundamental data used for safety as well as climatological reasons to forecast weather and issue warnings worldwide. [Office of the Federal Coordinator of Meteorology. [http://www.ofcm.gov/fmh 1/pdf/B CH2.pdf… …   Wikipedia

• Mass-Observation — was a United Kingdom social research organisation founded in 1937. Their work ended in the mid 1960s but was revived in 1981. The Archive is housed at the University of Sussex.Mass Observation aimed to record everyday life in Britain through a… …   Wikipedia

• USNS Observation Island (T-AGM-23) — Career (US) …   Wikipedia