EPAM Release Notes from the EPAM Team - April 2015 -------------------------------------------- The 5-minute and hourly EPAM spin-averaged flux data sets provided by the ASC have been reprocessed, using updated energy-bands and geometry factors. Statistical uncertainties are now handled in a consistent manner for both the hourly and the 5-minute averages. All fluxes are now calculated by the ASC from rates data provided directly by the EPAM team. EPAM Release Notes from the EPAM Team - January 2007 -------------------------------------------- The EPAM team identified a timing drift in the EPAM data. This timing drift was ~ 1 minute/year. The team has identified the source of this drift fixed the problem. The entire entire EPAM dataset has been regenerated. EPAM Release Notes from the EPAM Team - December 2003 -------------------------------------------- After DOY 302, 2003, the P1-P6 channels contain fill data (-999.9). This is due to a sudden noise increase in the detector, which makes the output from these channels unreliable. EPAM Release Notes from the EPAM Team - July 2002 -------------------------------------------- After DOY 78, 1998, the E1, E2 and E3 channels contain fill data (-999.9). This is due to a sudden noise increase in the detector, which makes the output from these channels unreliable. After DOY 327, 2001, the P1 channel contains fill data (-999.9). This is due to a sudden noise increase in the detector, which makes the output from this channel unreliable. EPAM Release Notes from the EPAM Team - November 20, 2001 -------------------------------------------- The LEMS30 telescope with ion channels P1-P8 (0.046 MeV< E < 4.7 MeV) is oriented 30 deg to the ~Sunward spacecraft spin axis. Frequent spacecraft maneuvers orient the telescope in such a manner that two of its sectors directly observe solar Xrays and therefore are not responding to the indicated ions. This response was well known from its progenitor (Ulysses/HISCALE). This response has been observed from P1-P5 and the level 2 data has been modified in such a manner as to remove this from the data. As the spacecraft is allowed to pass closer and closer to the solar exclusion zone this effect may become stronger and may effect channels higher than P5. When an inaccurate response is being observed it is obvious because the intensities are significantly higher then one would expect from the ions under investigation. We suggest that users of the level 2 LEMS30 ion data take this into consideration and if questions arise contact the EPAM team for comment. Questions of this nature can be sent to Dennis Haggerty (dennis.Haggerty@jhuapl.edu). EPAM Release Notes from the EPAM Team - October 25, 2000 -------------------------------------------- The following release note applies to ACE/EPAM data concerning time period from July 14-16, 2000 (Day of Year 196 to 198): The EPAM instrument team has determined from the current available information that some of the EPAM ion/electron channels may not be responding properly due to high energy particles during the July 14-16, 2000 large solar energetic particle events. We summarize our current findings on our channel responses in the following table. Users who wish to use data that are in question should first consult with the instrument lead investigator, Dr. Robert Gold (robert.gold@jhuapl.edu): ACE/EPAM Channel: Time Period A Time Period B Time Period C DE1, DE2, DE3, DE4 OK OK OK E'1, E'2, E'3, E'4, FP'5, FP'6, FP'7 OK Under investigation OK P1, P2, P3, P4, P5, P6, P7, P8 OK Under investigation OK P'1, P'2, P'3, P'4, P'5, P'6, P'7, P'8 OK Under investigation OK W1, W2, W3, W5, W7 OK Contact EPAM team OK W4, W6, W8 OK Under investigation OK Time Period A: DOY 196 0000 - DOY 196 1000 UT Time Period B: DOY 196 1000 - DOY 197 2000 UT Time Period C: DOY 197 2000 - DOY 199 0000 UT The EPAM team will continue to investigate the instrument response during these time periods, we will update the status of the EPAM data here as such information becomes available. EPAM Release Notes from the EPAM Team - 1998 -------------------------------------------- On DOY 79, 1998, electron detector channels E1, E2, and E3 were lost. From this time forward, there will be only fill data (-999.9) for these channels.