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Both HY-1C and HY-1D are equipped with a satellite calibration spectrometer (SCS) which provides on-orbit radiometric calibration for COCTS and UVI sensor systems. [ 14 ] [ 17 ] Haiyang 1C and Haiyang 1D also maintain an automatic identification system (AIS) payload, used to track and identify ship locations, to collect, store, and relay AIS ...
Box-spring Queen size box-spring on metal bed frame 8-way hand-tied box spring. A box-spring (or divan in some countries) is a type of bed base typically consisting of a sturdy wooden frame covered in cloth and containing springs. Usually, the box-spring is placed on top of a wooden or metal bedframe that sits on the floor and acts as a brace ...
BeiDou-1, first generation experimental satellite - BeiDou-1B 20 December 2000 16:20 Xichang, LC-2 Long March 3A: N/A GEO 80° E Retired December 2011: BeiDou-1, first generation experimental satellite - BeiDou-1C 24 May 2003 16:34 Xichang, LC-2 Long March 3A: N/A GEO 110.5° E Retired December 2012: BeiDou-1, first generation experimental ...
This foundation is often paired with an innerspring mattress, as it extends the life of the spring unit at the mattress's core. [ citation needed ] Legs may be attached directly to the bottom of a boxspring, if it has a suitable frame, or the boxspring may be laid on a bedframe or another bed base.
Mattress coils, also known as mattress springs, are coil springs used in a mattress. Coils are primarily used in the core (support layer) of innerspring mattresses , which is their original use. In recent years, small "micro-coils" are being used in the upholstery (comfort layer) of mattresses, primarily with a coil core ("coil-on-coil ...
On 2 November 2006, China announced that from 2008 BeiDou would offer an open service with an accuracy of 10 metres, timing of 0.2 microseconds, and speed of 0.2 metres/second. [29] In February 2007, the fourth and last satellite of the BeiDou-1 system, BeiDou-1D (sometimes called BeiDou-2A, serving as a backup satellite), was launched. [30]
Modern spring mattress cores, often called "innersprings" are made up of steel coil springs, or "coils". The gauge of the coils is one factor which determines firmness and support. Coils are measured in quarter increments. The lower the number, the thicker the spring. In general, higher-quality mattress coils have a 14-gauge (1.63 mm) diameter.