The ReviewThe Reviewof theof the

Archive of Lunar Graze ObservationsArchive of Lunar Graze Observations

Presented atPresented at

Trans Tasman Symposium on Occultations - 4Trans Tasman Symposium on Occultations - 4

(March 2010 – Canberra Australia)(March 2010 – Canberra Australia)

andand

IOTA AGM IOTA AGM

(December 2010 – Boston U.S.A.)(December 2010 – Boston U.S.A.)

By Dave GaultBy Dave Gault

and on behalf ofand on behalf of

Dave HeraldDave Herald

The PlanThe Plan

Merge all known collections of graze Merge all known collections of graze observations. into one collection. (RGO - Computer Records, RGO – Grazes (OCR’d), Occult, ILOC, Soma) (RGO - Computer Records, RGO – Grazes (OCR’d), Occult, ILOC, Soma)

Occult – Dave Herald developed tools and functionality to handle the review.Occult – Dave Herald developed tools and functionality to handle the review.and then…and then… Restore lost data for grazes pre 1974 – (observers: Unknown A, B,C,D ect). Restore lost data for grazes pre 1974 – (observers: Unknown A, B,C,D ect).

Ken Coles at Indiana Univ. of Pennsylvania has David Dunham’s files he collected while at USNOKen Coles at Indiana Univ. of Pennsylvania has David Dunham’s files he collected while at USNO Review and correct errors, syntax, mark duplicated data and set invalid events.Review and correct errors, syntax, mark duplicated data and set invalid events. Find previously unreported grazes and create new reports to add to the archive.Find previously unreported grazes and create new reports to add to the archive.

The Graze Editor (before work)The Graze Editor (before work)

The Graze Editor - ReviewedThe Graze Editor - Reviewed

Restoring the pre 1974 dataRestoring the pre 1974 dataViews of the work of Ken ColesViews of the work of Ken Coles

85% of grazes before 1970 restored and reviewed

49 new previously unreported grazes now incorporated in the archives

Kaguya (Selene) DataKaguya (Selene) Databecomes availablebecomes available

6 months into the review the Kaguya (Selene) data becomes available for download6 months into the review the Kaguya (Selene) data becomes available for download Dave Herald updated Occult to use Kaguya Data in observed limb plots and predictionsDave Herald updated Occult to use Kaguya Data in observed limb plots and predictions This caused a re-review of all grazes already processedThis caused a re-review of all grazes already processed

A first! - Mobile Graze Observers,A first! - Mobile Graze Observers,observing events at the Dark Limbobserving events at the Dark Limb

The first successful dark limb graze where the observers travelled to their sites - 1963 September 8th Graze of ZC 464, Davis, California

Fully Restored

High school students open the eyes of USNOHigh school students open the eyes of USNO

The illegitimate delta Cancri grazeThe illegitimate delta Cancri grazenow legitimate!now legitimate!

Occultation DetectiveOccultation DetectiveQuick Cases SolvedQuick Cases Solved

Occultation Detective - tough casesOccultation Detective - tough casesA difficult Brief…A difficult Brief…

Observed with the Milwaukee Graze Cable – Gary Samolyk the organiser

Occultation DetectiveOccultation Detective…..Case Solved…..Case Solved

Some grazes remain unsolvedSome grazes remain unsolved

More site errors or star error?More site errors or star error?The jury is out!The jury is out!

True star coordinate errorsTrue star coordinate errorsexpect a paper about this!expect a paper about this!

Missing Graze ReportsMissing Graze Reports

Lunar Eclipse graze of alpha Librae 5 expeditions of 35 observers at the southern limit recorded 198 events! Meanwhile… 8 observers flew from the USA to Sudan to observe at the northern limit. No events in the archives and the reports are still missing!

SummarySummary

Total number of Grazes Reviewed = 3618Total number of Grazes Reviewed = 3618 Total number of events considered = 64989Total number of events considered = 64989 Number of new (previously unreported) grazes found, reports created, double checked Number of new (previously unreported) grazes found, reports created, double checked

and merged into the archive = 193and merged into the archive = 193 Hours invested in this project? – don’t ask! Hours invested in this project? – don’t ask! Number of graze reports lost for all time = “who knows?”Number of graze reports lost for all time = “who knows?”

The complete lunar archive is now archived at…The complete lunar archive is now archived at…

The EndThe End

Questions…?Questions…?