07/03/03 48821 CTB Converted to XML format This relation is used in OPUS to define the order in which sections of keywords appear in a FITS header. The keywords are grouped in the cgg1_keyword relation by instrument and 'file_type'. In fact the 'file_type' field has been used, historically, just to group keywords together. This relation specifies for each FITS header (for a particular instrument) which cgg1 keyword groups should be put in that header in which order. C3 The name of the instrument: eg: NIC or STI C36 The name of the FITS header. eg: NIC_SPT_PRIMARY I2 The order in which to put the following section C3 The cgg1_keyword relation instrument name. This can be the same as 'instrument' above, or another name such as SSY or GEN. C3 The cgg1_keyword relation 'file_type' specification for this section of keywords. ORDER_TYPE Keyword section order OPUS