The optional angularUnit attribute defines the unit name for the SummaryStatisticsAngularType.
Source
<xs:complexType name="SummaryStatisticsAngularType"><xs:annotation><xs:documentation>The SummaryStatisticsAngularType defines a summary of a single angular statistical value.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="SummaryStatisticsType"><xs:attribute name="angularUnit" type="xs:token"><xs:annotation><xs:documentation>The optional angularUnit attribute defines the unit name for the SummaryStatisticsAngularType.</xs:documentation></xs:annotation></xs:attribute></xs:extension></xs:complexContent></xs:complexType>
<xs:attribute name="angularUnit" type="xs:token"><xs:annotation><xs:documentation>The optional angularUnit attribute defines the unit name for the SummaryStatisticsAngularType.</xs:documentation></xs:annotation></xs:attribute>