CHAPTER 12 THE SYNOPTIC CODE DETAILED DESCRIPTION
Amendmentnoi~ ,theobserverwillfindthatthepreparationof theSynopticmessageis simplifiediftheappropriateentriesforline sandcolumnsIto42aonForm63 9028,TablesforSynopticCode,willassistthe min 2322aregivenin is thefirstgroupof thesecondlineof themessageheader.(M1M1M~M~isencodedBBXXf orsy-nopticreportsfromshipstations.) thesecondlineof themessageheaderofa Dayofthemonth(UTC).GG Houroftheobservation(UTC). ~ Windindicator, fori~, ptionofspecifyinga3or 4,dependingonwhetheror ~ Stationnumber, , Thissymbolis anindicatorto showwhetheror nottheprecipitationgroup6RRRtRis includedinthemessageand,ifincluded,inwha tSectionof :iR0inSections1and3includedinbothSection sinSection1included2inSection3included3i n noneof thetwosectionsomitted(precipitationland3 amount=0)4innoneof thetwosectionsomitted(precipitationIand3 amountnotavailable) ,itisincludedinSectionI, andiRis astationwhichtrans-mitsintermediatesynop ticreports,anditoccursbetweenamainsynopt ichourandthesubsequentintermedi-atesynop tichour,the6RRRtRgroupwillbeincludedinth eintermediatesynopticreport, ,~ Thissymbolindicateswhetherthesynopticmes sagehasoriginatedfromamannedoranauto-mat icstationandsecondly,whetheror
synoptic report. 12.1 .1 Complete instructions for recording the observed data on Form 63—23 22 are given in Chapter 13. 12.2 SECTION 0 12.2.1 GroupMIMIMJMJ This group is inserted by the commmunications computer in the message header foridentification of synoptic bulletinsand is encoded AAXX for synoptic reports from land stations.
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