Territory Stories

Electronic Data Collection and Analysis System



Electronic Data Collection and Analysis System


Yin Foo, Des; Foley, Margaret


E-Publications; PublicationNT; E-Books; Report ; 39/1992




Made available via the Publications (Legal Deposit) Act 2004 (NT).





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Power and Water Authority

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Report ; 39/1992

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Technical Report WRD92039 Viewed at 15:07:17 on 29/07/2010 Page 178 of 192. calibrate {L} using {T}; Check thH graph of {T} correlation as per (B) above; . v . {Ll for scatter and If calibration looks acceptable, then accept it, othen,ise try to see which points are causing the scatter and amend {T}; {L} ~s now recalibrated Information LiEe (I.L.) updated data, and should have its' ("recalbrated by NN readings); Go through original 1,1anuals {Z}, at expanded scales, to see how close it looks; calculate the "errors" of Logged recalibrated data compared to the manual readings by subtracting set {Z} from set {J~} (at cornman times - interpolate {L} onto {Z} times, this time deleting only times which are not corrmon, and leaving any suspect data; Call the resulting set {E}; WRITE {E} in "other" format with some convenient units and start time (e.g. minutes after an even hour); Call file "CAL-ERR.DAT"; This file can now be read into a spreadsheet programme, for calculatio':l of the error statistics and the reliability of the data can be estimated. Notes: (i) It is desirable to have Barometric pressure readings at thesame times as the LDD which is to be corrected. At least hourly readings should be taken. (ii) Choose a "start" time, "to", (usually the last even minute for which the DD was 0), where the Logger readings are steady; Some Logged data .,ill usually precede this "to" i Make sure to include a Manual reading of 0 in Manual file. ( iii) ThE) LDD at any time is the initial head at the

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