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The Review of the Archive of Lunar Graze Observations Presented at Trans Tasman Symposium on Occultations - 4 (March 2010 – Canberra Australia) and IOTA.

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Presentation on theme: "The Review of the Archive of Lunar Graze Observations Presented at Trans Tasman Symposium on Occultations - 4 (March 2010 – Canberra Australia) and IOTA."— Presentation transcript:

1 The Review of the Archive of Lunar Graze Observations Presented at Trans Tasman Symposium on Occultations - 4 (March 2010 – Canberra Australia) and IOTA AGM (December 2010 – Boston U.S.A.) By Dave Gault and on behalf of Dave Herald

2 The Plan Merge all known collections of graze (RGO - Computer Records, RGO – Grazes (OCRd), Occult, ILOC, Soma) Merge all known collections of graze observations. into one collection. (RGO - Computer Records, RGO – Grazes (OCRd), 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… Restore lost data for grazes pre 1974 – (observers: Unknown A, B,C,D ect). Ken Coles at Indiana Univ. of Pennsylvania has David Dunhams files he collected while at USNO Restore lost data for grazes pre 1974 – (observers: Unknown A, B,C,D ect). Ken Coles at Indiana Univ. of Pennsylvania has David Dunhams 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.

3 The Graze Editor (before work)

4 The Graze Editor - Reviewed

5 Restoring the pre 1974 data Views of the work of Ken Coles 85% of grazes before 1970 restored and reviewed 49 new previously unreported grazes now incorporated in the archives

6 Kaguya (Selene) Data becomes available 6 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 predictions This caused a re-review of all grazes already processed

7 A first! - Mobile Graze Observers, observing events at the Dark Limb The first successful dark limb graze where the observers travelled to their sites September 8th Graze of ZC 464, Davis, California Fully Restored

8 High school students open the eyes of USNO

9 The illegitimate delta Cancri graze now legitimate!

10 Occultation Detective Quick Cases Solved

11 Occultation Detective - tough cases A difficult Brief… Observed with the Milwaukee Graze Cable – Gary Samolyk the organiser

12 Occultation Detective …..Case Solved

13 Some grazes remain unsolved

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

15 True star coordinate errors expect a paper about this!

16 Missing 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!

17 Summary Total number of Grazes Reviewed = 3618 Total number of Grazes Reviewed = 3618 Total number of events considered = Total number of events considered = Number of new (previously unreported) grazes found, reports created, double checked and merged into the archive = 193 Number of new (previously unreported) grazes found, reports created, double checked and merged into the archive = 193 Hours invested in this project? – dont ask! Hours invested in this project? – dont 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…

18 The End Questions…?


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