<xs:simpleType name="timeScaleType">

<xs:annotation>

<xs:documentation>

The actual time scale used: TT, TAI, UTC, TDB, etc.

</xs:documentation>

</xs:annotation>

<xs:restriction base="xs:string">

<xs:enumeration value="TT">

<xs:annotation>

<xs:documentation>Terrestrial Time; the basis for ephmerides</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="TDT">

<xs:annotation>

<xs:documentation>Obsolete synonym for TT</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="ET">

<xs:annotation>

<xs:documentation>

Ephemeris Time; predecessor of, and continuous with, TT

</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="TEB">

<xs:annotation>

<xs:documentation>

Barycentric Ephemeris Time:the independent variable in planetay ephemerides; time at the solar system barycenter synchronous with TT on an annual basis; often called TDB

</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="TDB">

<xs:annotation>

<xs:documentation>

Barycentric Dynamic Time: time at the solar system barycenter synchronous with TT on an annual basis; often confused with TEB

</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="TCG">

<xs:annotation>

<xs:documentation>Terrestrial Coordinate Time</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="TCB">

<xs:annotation>

<xs:documentation>

Barycentric Coordinate Time; runs slower than TDB but is consistent with physical constants

</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="TAI">

<xs:annotation>

<xs:documentation>

International Atomic Time; runs 32.184 s behind TT

</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="IAT">

<xs:annotation>

<xs:documentation>Synonym for TAI</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="UTC">

<xs:annotation>

<xs:documentation>

Coordinated Universal Time; currently (2004) runs 34 leapseconds behind TAI

</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="LST">

<xs:annotation>

<xs:documentation>

Local Siderial Time; only for ground-based observations; note that the second is shorter

</xs:documentation>

</xs:annotation>

</xs:enumeration>

<xs:enumeration value="LOCAL">

<xs:annotation>

<xs:documentation>

Only to be used for simulations in conjunction with a relocatable spatial frame

</xs:documentation>

</xs:annotation>

</xs:enumeration>

</xs:restriction>

</xs:simpleType>

This XML schema documentation has been generated with DocFlex/XML RE 1.8.0 using DocFlex/XML XSDDoc 2.2.0 template set.

DocFlex/XML RE is a reduced edition of DocFlex/XML, which is a tool for programming and running highly sophisticated documentation and reports generators by the data obtained from any kind of XML files. The actual doc-generators are implemented in the form of special templates that are designed visually using a high quality Template Designer GUI basing on the XML schema (or DTD) files describing the data source XML.

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To insert images in your annotations using XHTML <img> tags (supported both in HTML and RTF output).
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Namespace:	http://www.ivoa.net/xml/STC/STCcoords/v1.20
Defined:	globally in coords-v1.20.xsd; see XML source
Used:	at 2 locations