ULYSSES-KEP/EPAC data files =========================== The file names for ULYSSES-KEP/EPAC Experiment data files are: ULYKEP-YYYY.dat or ULYKEP-YYYY-MM-TT.dat Where YYYY: Year, MM: Month, and TT: Data Category Type These are ASCII files, records seperated with LF (x0A) and fields with Blank (x20). Each record contains the following fields: - UTC (%24c) Universal Time for start of measuring interval e.g. 2000-01-01T00:44:48.000Z - SCET (%10d) S/C event time for start of measuring interval e.g. 1577839488 These are 'Seconds from 1950-01-01T00:00:00.000Z as provided by the Ulysses project. Leap seconds are treated such that scet/86400 will give the 0-offset start of an UTC day. - Identification (%12c) e.g. HST1S3H1A0C1 or BRT2..H0A1C0 or ER....H1A1C0 or MG.......... dots are used as filler characters for not applicable fields - Type (%6c) e.g. - Data Category (%2c) HK SP ER BR EL PR ZR OP OZ PS ZS HR HS EV EH MG BM - Telescope (%2c) T1, T2, T3, T4 - Species (%2c) S1, S2, S3, S4 - Flags (%6c) Filler Flags for Data Category: EH, MG, BM - Mode Selection (%2c) H0, H1 (Light Ion Mode, Heavy Ion Mode) this affects categories ER,EV,HS,HR only. - Discriminator A1 Status (%2c) A0, A1 (Low Threshold, High Threshold) this affects categories PS,ZS,PR,ZR only. - Discriminator C Status (%2c) C0, C1 (Low Threshold, High Threshold) this affects categories BR,EL only - AcquisitionTime (%11.5E) [sec] (not for Data Category: HK, SP, EV, EH, MG, BM) - DataValues (%12.5E) single precision float The error value indicator is -1.0, that value should not be used. - HK Housekeeping Data Units: ??? Values: hkI28[i] (i=0; i<8; i++) hk6V[i] (i=0; i<8; i++) hk5V[i] (i=0; i<8; i++) hk-6V[i] (i=0; i<8; i++) hkTelescopeTemp[i] (i=0; i<4; i++) hkSensorTemp[i] (i=0; i<4; i++) - SP Spin Data Units: ??? Values: spinRef spinRef_fraction spinRate[i] (i=0; i<4; i++) Hint: spinRef, spinRef_fraction are Integers - ER (HMOD) Event-Rate Low, Medium and High Omnidirectional Channels. ER are the rate channels ERL, ERM, ERH. They are summed over all 4 telescopes and mark portions of the dE/dx matrix. ERL includes protons and He basically, ERM has mainly C, N, O and ERH all elements above. All three channels are summed over all PHA energy channels in the specific portion of the matrix. In Light Ion Mode ERM contains mainly C, N and ERH all heavier ions. Units: particles / (s cm^2 ster) Values: erl erm erh - BR Background-Rate, 3 Channels Telescope: 1, 2, 3, 4 Threshold conditions are: Channel 1: A_1 B_1 C_1 (all detector rate) Channel 2: B_1 (B detector rate) Channel 3: C_1 (C detector rate) Units: particles / (s) Values: bra brb brc - EL Electrons, 2 Channels Telescope: 1, 2, 3, 4 Electrons Low (100-380 keV) Spin Averages Electrons High (E > 180 keV) Spin Averages The upper energy for EL high is not very well defined but is around 2MeV for electrons. Geometric factor is 0.148 cm^2 sr for direct entry and 0.535 cm^2 sr for electrons going through Al baffle (energy dependent). The ELH channel is also sensitive to cosmic ray energy protons (E>200MeV) with a geometric factor G=4.6 cm^2 sr. Units: particles / (s) Values: ell elh - PR (DA1) Proton-Rate, 8 Sectors Telescope: 2, 3 affected by noise in T3! Also different noise levels in T1,T2,T4. Energy ~500-1000 keV Units: particles / (s KeV cm^2 ster) Values: pr[ch] (ch=0; ch<8; ch++) - ZR (DA1) Ion-Rate, 8 Sectors Telescope: 2, 3 affected by noise in T3! Also different noise levels in T1,T2,T4. Energy ~200-500 keV for protons Units: particles / (s cm^2 ster) Values: zr[ch] (ch=0; ch<8; ch++) - OP (DA1) Omnidirectional-Protons, Spin Averages Telescope: 1, 2, 3, 4 affected by noise in T3! Also different noise levels in T1,T2,T4. Energy ~500-1000 keV Units: particles / (s KeV cm^2 ster) Values: op - OZ (DA1) Omnidirectional-Ions, Spin Averages but 4 Sectors for Telescope 1 Telescope: 1, 2, 3, 4 affected by noise in T3! Also different noise levels in T1,T2,T4. Energy ~200-500 keV for protons Units: particles / (s cm^2 ster) Values: oz[se] (se=0; se=1 ion spectral channels, very similar to the PS channels but total ion channels only where thresholds can be set to exclude certain species. Units: particles / (s cm^2 ster) Values: zs[se][ch] ((se=0; se<8; se++) (ch=0; ch<8; ch++)) - HR (HMOD) Heavy Ion Rates, summed over 8 Energy Channels and 8 Sectors Telescope: 1,2,3,4 Species: 1,2,3,4 This category is a sum of all 8 HS channels for each of the 4 selected species: HRS1 is the same as the sum of all 8 channels of HSS1 but with a different time resolution. See separate document EPAC-HS-Energies.txt for settings over time. Units: particles / (s cm^2 ster) Values: hr - HS (HMOD) Heavy Ion Spectral, 8 Energy Channels, 4 Sectors for Telescope 2 and 3) Telescope: 1,2,3,4 Species: 1,2,3,4 EPAC has 4 species x 8 energy channels (HST1S1-HST4S4) which are selectable. EPAC can run in heavy ion mode (H1) or in ion mode (H0). Basically what we do is to put boxes around the tracks for different species. For example the first 4 channels of the selected species 1 (HST1S1H1) contain 4 channels of He. Another example would be that EPAC had 8 sulfur (species 3) channels during the Jupiter flyby (HST1S3H1). We also changed the settings several times during flight. You will get a list for all HS channels over time including species and energy of them. See separate document EPAC-HS-Energies.txt for settings over time. Units: particles / (s cm^2 ster) Values: hs[se][ch] ((se=0; se"S"<1-4> (i=0; i<32; i++) Energies: where e[i] is the energy channel number in B-detector, range 0-511 and de[i] is the energy channel number in A-detector, range 0-255 EA[Mev]=(de[i]+1.0+facB(2+hmodbit))/facA(2+hmodbit) IF e(i) LT 256 THEN EB[Mev]=(e[i]+1.0+facB(0))/facA(0) $ ELSE EB[Mev]=(e(i)-256+1+facB(1))/facA(1) facA=[128.6,2.558,24.39,12.] ; ADC1 : Erange0,Erange1,dEimod,dEhmod facB=[16.03,6.5,7.317,7.] ; ADC1 : Erange0,Erange1,dEimod,dEhmod Note, that the top channels de=255 and e=511 are open for higher energies. - EH Ephemeris Data. See seperate document. Units: ??? Values: eh[i] (i=0; i<247; i++)