<xs:element name="InstrumentDetails">
    <xs:annotation>
        <xs:documentation />
    </xs:annotation>
    <xs:complexType>
        <xs:sequence>
            <xs:element ref="Corrections" />
            <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element ref="FieldNote" minOccurs="0" maxOccurs="unbounded" />
                <xs:element ref="Feature" minOccurs="0" maxOccurs="unbounded" />
            </xs:choice>
        </xs:sequence>
        <xs:attribute name="id" type="xs:ID" use="required" />
        <xs:attribute name="edmAccuracyConstant" type="xs:double" />
        <xs:attribute name="edmAccuracyppm" type="xs:double" />
        <xs:attribute name="edmVertOffset" type="xs:double" />
        <xs:attribute name="horizAnglePrecision" type="xs:double" />
        <xs:attribute name="manufacturer" type="xs:string" />
        <xs:attribute name="model" type="xs:string" />
        <xs:attribute name="serialNumber" type="xs:string" />
        <xs:attribute name="zenithAnglePrecision" type="xs:double" />
        <xs:attribute name="carrierWavelength" type="xs:double" />
        <xs:attribute name="refractiveIndex" type="xs:double" />
        <xs:attribute name="horizCollimation" type="xs:double" />
        <xs:attribute name="vertCollimation" type="xs:double" />
        <!-- In order to compute the atmospheric corrections correctly record the 
			EDM instrument carrier wavelength (carrierWavelength) and the group refractive index
			for the instrument (refractiveIndex). -->
        <!-- To allow for older style top mounted EDM's -->
    </xs:complexType>
</xs:element>