From email@example.comTue Mar 25 09:38:45 1997 Date: Mon, 24 Mar 1997 14:57:48 -0800 From: firstname.lastname@example.org To: email@example.com Cc: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org Subject: WG Mtg #118 Minutes IPAC 2MASS Working Group Meeting #118 Minutes 3/18/97 Attendees: R. Beck, R. Cutri, T. Evans, J. Fowler, L. Fullmer, G. Kopan, B. Light, H. McCallon, J. White AGENDA 1.) Position Reconstruction Biases 2.) NAMELIST Deliveries DISCUSSION 1.) Position Reconstruction Biases H. McCallon described the symptoms of a bias problem in the position reconstruction that R. Cutri had brought to his attention. In fact, two apparently separate bias problems have been identified: one involves position biases between Read1 and Read2-Read1 detections on the same scans, and the other involves scan-to-overlapping-scan biases, primarily in declination. Howard is currently investigating both of these problems. [Note added in proof: the Read1/Read2-Read1 bias appears to have been found by H. McCallon while following up a lead suggested by G. Kopan; the band-frame position transformation to band-scan coordinates applied to Read1 detections in PFPOST was applicable only to Read2-Read1 detections (an analogous transformation routine had not yet been written for Read1 detections at the time PFPOST was written as a temporary fill-in routine designed mostly to allow data flow for pipeline testing), so that the Read1/Read2-Read1 offset correction was not being applied; this is fixed in the newly delivered PFPOST. The other bias problem is still being studied.] 2.) NAMELIST Deliveries Standard delivery procedure involves a difference in the way code and data (most frequently, NAMELIST) files are delivered. Code is delivered to rodan:/2massc/del/src/SUBSYSTEM (where "SUBSYSTEM" is the subsystem name), and data files are delivered to rodan:/2massc/del/datan (for northern-hemisphere data; "datan" will be replaced by "datas" for southern-hemisphere data when this becomes appropriate).