simpleType "crd:timeScaleType"
Namespace:
Defined:
globally in coords-v1.20.xsd; see XML source
Used:
Simple Content Model
"TT" | "TDT" | "ET" | "TEB" | "TDB" | "TCG" | "TCB" | "TAI" | "IAT" | "UTC" | "LST" | "LOCAL"
All Direct / Indirect Based Elements (2):
Known Usage Locations
Annotation
The actual time scale used: TT, TAI, UTC, TDB, etc.
Type Definition Detail
Type Derivation Tree
xs:anySimpleType (restriction)
  xs:string (restriction)
      crd:timeScaleType
Derivation:
restriction of xs:string
XML Source (see within schema source)
<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>

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