英文译中文（GPS导航仪要求）

英文译中文（GPS导航仪要求）Specs of GLOBAL POSITIONING SYSTEM (GPS)1.Data Entry.GPS should accept data input through alphanumeric keys.2.Display.7” LCD display unit to show inputs and outputs.There should be facility of back light to view display during night.3.Initialization.Both automatic and manual.4.Signal Quality.High.5.Almanac Update.Facility should exist.Time taken to update should be less than 10 minutes.6.Coordinate System.Should allow user to select a coordinate system or set up a user defined gird.7.Map Datum.Allow user choose a particular map datum.8.Altitude Reference.Allows the user to select how the unit calculates the altitude (MSL,HAE or HAG).9.Mask Angle.To set the angle above horizon,below which the receiver will not look for satellites.10.Timer.To set a time and duration for a selected function to start and operate.11.Distance Units.Selected by user.12.Route Mode.Allow automatic or manual route mode.13.Data Order.Should allow user to select the order in which unit displays the month.14.Auxiliary Functions.The GPS should support following auxiliary functions.(a) Receiver status.(b) Set Schedule.(c) Sat Status.(d) View Data.(e) Waypoint Projection.(f) Reverse Route.(g) Memory statistics.(h) File maintenance.(j) Product support.15.Waypoint.Should support waypoint navigation by the user.16.Attributes.Capability to assign attributes to data.Should support both Numerical attributes and attributes from external sources.17.Zooming and Map options.Should be able to perform zooming and map options.18.Operating Temperatures.(-) 30ºC to (+) 50ºC.19.Rugged and easy to carry for outdoor use.20.Weight.Less than 300 gm with batteries.21.Water Proof.It should be moisture proof and have water resistant casing.22.Grid Reference.10 digits.23.Size.(a) Length.Less than 6”.(b) Width.Less than 4”.(c) Height.Less than 3”.24.Altitude.Function upto altitude of 25000 feet.25.Restore Defaults.Facility should exist with press of key (s).26.Colour.Preferably dark with mat finish paint to avoid shining.27.Shock Proof.Should withstand normal shock of fall from upto sixteen feet height.28.Strap.Provided with neck strap.29.Belt Clip.To secure it with military belt.30.Carry Case.Waterproof and soft case.