From baguhl@kosmo.DNET.NASA.GOV Sat Jul 22 03:43 MST 1995 Return-Path: Received: from astro.as.arizona.edu by dorothy.as.arizona.edu (5.0/SMI-SVR4) id AA02659; Sat, 22 Jul 1995 03:43:06 -0700 Received: from east.gsfc.nasa.gov by astro.as.arizona.edu (5.0/SMI-SVR4) id AA24648; Sat, 22 Jul 1995 03:43:05 -0700 Received: from KOSMO.DECnet MAIL11D_V3 by east.gsfc.nasa.gov (5.57/Ultrix3.0-C id AA05703; Sat, 22 Jul 95 06:43:02 -0400 Date: Sat, 22 Jul 95 06:43:01 -0400 Message-Id: <9507221043.AA05703@east.gsfc.nasa.gov> From: baguhl@kosmo.DNET.NASA.GOV (ULYSSES/GALILEO-DUST Team, MPI-K Hd) To: "sykes@as.arizona.edu"@EAST.DNET.NASA.GOV Cc: BAGUHL@east.gsfc.nasa.gov Subject: RE: DDS velocities Content-Type: text Content-Length: 1219 X-Lines: 40 Status: RO Dear Mark, thanks for your very thorough checking of the data. We had to dig a little bit in the calibration routine to get the reason, that is, mainly Rainer did, so I'm just appending his text. The reason for the exclusion of the values 49,18,31 and 15 is empirical. These values are close to the switching points of the amplifier ranges and therefor produce incorrect time measurements. The adjustment of the times in amplifier range 2 was made in order to prevent illegal time values. I hope this helps to clarify the measurements. Regards Michael Rainers text: ------------- Galileo: if IA=49 or IA =18 or IA<3 then IT is not valid, (take v_et) if EA=49 or EA =31 or EA<5 then ET is not valid, (take v_et) if both of them are not valid, v=11.8 and vef=11.8 This explains the particles G39,G48,G118 (IA=49);G226 (IA=18) and G21,G60,G179,G324 (EA=31). Ulysses: if IA=49 or IA>=60 or IA<3 then IT is not valid, (take v_et) if EA=15 or EA>=60 or EA<5 then ET is not valid, (take v_et) if both of them are not valid, v=11.8 and vef=11.8 This explains U120 (IA=49) and U769 (EA=15). There is another condition for Galileo and Ulysses and this explains all the other cases: if IA>16 and IT>12 then set IT=14