###Pioneer 11 Cosmic Ray Telescope Calibrated Bundle ####Pioneer 11 CRT Calibrated 15 Minute Data Collection PDS3 DATA_SET_ID = P11-J-CRT-4-SUMM-FLUX-15MIN-V1.0, P11-S-CRT-4-SUMM-FLUX-15MIN-V1.0 PDS3 DATA_SET_NAME = P11 JUPITER CRT ELECTRON/PROTON/ION FLUX 15 MIN AVGS V1.0, P11 CRT 15 MINUTE SATURN ENCOUNTER DATA START_TIME = 1974-11-26T00:00:00 STOP_TIME = 1979-09-03T18:45:00 PRODUCER_FULL_NAME = FRANK B. MCDONALD #####References: McDonald, Frank B., P11 JUPITER CRT ELECTRON/PROTON/ION FLUX 15 MIN AVGS V1.0, P11-J-CRT-4-SUMM-FLUX-15MIN-V1.0, P11 CRT 15 MINUTE SATURN ENCOUNTER DATA V1.0, P11-S-CRT-4-SUMM-FLUX-15MIN-V1.0, NASA Planetary Data System. These data were originally archived in the following PDS3 data sets: PDS3 P11-J-CRT-4-SUMM-FLUX-15MIN-V1.0 * https://doi.org/10.17189/1519779 PDS3 P11-S-CRT-4-SUMM-FLUX-15MIN-V1.0 * https://doi.org/10.17189/1519795 *** ##### Collection Overview This collection contains Pioneer 11 Cosmic-ray telescope (CRT) data from the Jupiter encounter period, covering 1974-11-26 to 1979-09-03. The collection provides 15.0 minute flux averages from 18 electron, proton, and heavy ion channels. This collection consists of particle flux data and their associated statistic errors recorded by the Cosmic Ray Telescope subsystems onboard the Pioneer 11 spacecraft, during the Jupiter encounter period. Data are provided in 5 files and 18 flux channels from the High Energy Telescope (HET), Low Energy Telescope I (LET-I), and Low Energy Telescope II (LET-II) subsystems. Each channel is defined either by a single detector, or in most of the cases, a multiple detector coincidence logic, to supply three particle types: electrons, protons, protons and heavy ions. *** ##### Data Channels In the following rate/flux channel definitions, detectors in HET are identified by A, B, C1, C2, C3, that of LET-I subsystem, by D1, D2, E, F, and ones of LET-II subsystem, by S1, S2, S3, S2(A). Detector S2(A) is an annular guard detector in LET-II. The subscript in parentheses of a detector identifier refers to the trigger threshold on that detector. Several detectors defining a rate/flux channel are in coincidence unless the symbol '^' preceding the detector identifier indicating that detector is in anti-coincidence. (1) A2 Rate (Saturn only) gives the counting rate in a 2.5 mm thick Si detector with an area of 3.0 cm**2. Since the threshold is set at 2.01 MeV, it responds primarily to energetic electrons; however, the effective solid angle and detection efficiency are not well known. This rate is given for Saturn because the more desirable coincidence rates suffered from excessive accidentals. The rate ID is A2. (2) A1.^A2.B.^C1 Rate (Jupiter only) gives the flux of electrons with a range between 2.5 and 5.0 mm of Si which deposit less than 2 MeV in the front detector. The electron energy falls into the range of about 1.8 to 3.2 MeV. The rate ID is A1.^A2.B.^C1. (3) A1.^A2.B.C1.^C2 Rate (Jupiter only) gives the electron flux with a range of 5 to 10 mm Si; the approximate energy range of 3.2 to 5.1 MeV. The rate ID is A1.^A2.B.C1.^C2 (4) A1.^A2.B.C1.C2.^C3 Rate (Jupiter only) gives the electron flux with a range of 10 to 15 mm Si; the approximate electron energies are 5.1 to 8 MeV. The rate ID is A1.^A2.B.C1.C2.^C3. (5) ^S1.S2(5).^S2(A).^S3 Rate gives the flux of electrons in LET-II which do not trigger the 0.145 MeV threshold in the 50 gamma front detector and trigger the 50 keV threshold in the 2.5 mm thick second detector. The anti-coincidence requirement with the annular guard counter S2(A) and rear detector S3 insures that the electrons stop in S2. Our calibrations show that the 50% efficiency points occur at 0.16 and 2.0 MeV. If the electron spectrum is hard, this rate will also respond to bresmsstrahlung and electrons penetrating the collimator. The latter effect made the dominant contribution in the inner Saturnian magnetosphere; otherwise, it is believed to be small but is difficult to evaluate. The rate ID is ^S1.S2(5).^S2(A).^S3. (6) ^S1.S2(6).^S2(A).^S3 Rate is equivalent to rate (5) but with a 0.35 MeV threshold in S2, corresponding to electron energies from 0.43 to 2.0 MeV. The rate ID is ^S1.S2(6).^S2(A).^S3. (7) ^S1.S2(7).^S2(A).^S3 Rate is equivalent to rate (5) but with a 0.7 MeV threshold in S2 corresponding to electron energies from 0.8 to 2.0 MeV. The rate ID is ^S1.S2(7).^S2(A).^S3. (8) ^S1.S2(8).^S2(A).^S3 Rate is equivalent to rate (5) but with a 1.0 MeV threshold in S2 corresponding to electron energies from 1.1 to 2.0 MeV. The rate ID is ^S1.S2(8).^S2(A).^S3. (9) D1(4) Rate gives the flux of protons and ions which penetrate a 0.53 mg/cm**2 aluminized mylar foil and deposit at least 0.60 (P11) or 0.63 (P11) MeV in detector D1 of LET-I. (This rate is not given for the Saturn encounter because of substantial electron contamination.) For protons, this corresponds to energies from 0.84 to 15.1 MeV. (10) D1(5) Rate is equivalent to rate (9), but with a threshold in D1 of 0.95 MeV corresponding to proton energies between 1.11 and 8.1 MeV. (11) D1(6) Rate is equivalent to rate (9), but with a threshold in D1 of 1.45 MeV corresponding to proton energies from 1.6 to 5.1 MeV. (12) D1(7) Rate is equivalent to rate (9), but with a threshold energy in D1 of 2.20 (P11) or 2.05 (P11) MeV corresponding to proton energies from 2.3 to 3.6 MeV (P11) or 2.1 to 3.8 MeV (P11) respectively. (13) D1.D2.E2.^F Rate from LET-I gives the proton flux between 10.3 and 21 MeV (P11) and between 11 and 21 MeV (P11). A small correction has been made for the contribution from alphas and heavier nuclei in the same energy/nucleus range. The rate ID is D1.D2.E2.^F - D1.D2.SIGMA(D.E4.^F). (14) S1(1).^S2.^S2(A).^S3 Rate gives the flux of protons and heavier ions which stop in the 50 gamma thick S1 detector S1 and deposits energy between 0.16 and 2.6 MeV. This corresponds to proton energies between 0.20 and 2.15 MeV (P11) or 0.20 and 2.17 MeV (P11). Detector S1 is shielded by only 0.12 mg/cm**2 of Al and is, therefore, relatively sensitive to low-energy ions. At Saturn, the ion contribution is negligible; however, it may be significant at Jupiter. The rate ID is S1(1).^S2.^S2(A).^S3 - S1(4).^S2.^S2(A).^S3. (15) S1(6).^S2.^S2(A).^S3 Rate is equivalent to rate (14) except that the threshold in S1 is 0.47 (P11) or 0.5 (P11) MeV, this corresponds to proton energies of 0.50 to 2.15 MeV (P11) or 0.53 to 2.17 MeV (P11), respectively. The rate ID is S1(6).^S2.^S2(A).^S3 - S1(4).^S2.^S2(A).^S3. (16) S1(2).^S2.^S2(A).^S3 Rate is equivalent to rate (14) except that the threshold is 0.74 MeV (P11) or 0.72 MeV (P11), this corresponds to proton energies of 0.76-2.15 MeV (P11) or 0.74-2.17 MeV (P11). The rate ID is S1(2).^S2.^S2(A).^S3 - S1(4).^S2.^S2(A).^S3. (17) S1(3).^S2.^S2(A).^S3 Rate is equivalent to rate (14) except the threshold is 1.2 MeV, corresponding to proton energies of 1.24 to 2.15 MeV (P11) and 1.24-2.17 MeV (P11). The rate ID is S1(3).^S2.^S2(A).^S3 - S1(4).^S2.^S2(A).^S3. (18) S1.S2(1).^S2(A).^S3 Rate gives the flux of protons between 3.13 and 14.8 MeV (P11) and 3.19 to 14.9 MeV (P11). The rate ID is S1.S2(1).^S2(A).^S3 - S1.S2(3).^S2(A).^S3. (19) S1.S2(2).^S2(A).^S3 Rate is equivalent to rate (18) except for a higher threshold and covers protons from 5.65 to 14.8 MeV (P11) and 5.68 to 14.9 MeV (P11). The rate ID is S1.S2(2).^S2(A).^S3 - S1.S2(3).^S2(A).^S3. *** #####Data Sampling These data are provided in 15 minute averages. The resolution from which the 15 minute averages were generated is unknown. CRT data telemetry was designed to keep the rate data cycle time between 3 and 7 minutes. #####Data Formats The Pioneer 11 Cosmic Ray data during Jupiter encounter were originally written on 9-track binary magnetic tape, at 1600 BPI, on an IBM 360 computer. There are 5 data files covering different flux groups. Each binary file was re-formatted into a new ASCII file. Detailed description for each file is given as below. P11_CRT_JUP_15MIN_HET.TAB contains HET electron flux measurements. | Name | Format | Column Description | |----------------------|--------|---------------------------------------| | START_TIME | A23 | Start time of each averaging interval in yyyy-mm-ddThh:mm:ss.sss | | R6A_FLUX | E13.6 | Flux of R6A channel from HET | | R6A_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R6A channel | | R6B_FLUX | E13.6 | Flux of R6B channel from HET | | R6B_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R6B channel | | R7A_FLUX | E13.6 | Flux of R7A channel from HET | | R7A_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R7A channel | #####The coincidence logic for each flux column is described as below: * Column 2 = (R6A / 2.200E-01) R6A = A1.^A2.B.^C1 * Column 4 = (R6B / 2.200E-01) R6B = A1.^A2.B.C1.^C2 * Column 6 = (R7A / 2.200E-01) R7A = A1.^A2.B.C1.C2.^C3 P11_CRT_JUP_ENC_15MIN_LET_IIA.TAB contains LET-II electron flux measurements. | Column Name | Column Format | Column Description | |--------------------------|----------------|-------------------------------------| | START_TIME | A23 | Start time of each averaging interval in yyyy-mm-ddThh:mm:ss.sss | | SR2E(9)_FLUX | E13.6 | Flux of SR2E(9) channel from LET-II | | SR2E(9)_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of SR2E(9) channel | | SR2F(9)_FLUX | E13.6 | Flux of SR2F(9) channel from LET-II | | SR2F(9)_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of SR2F(9) channel | | SR2G(9)_FLUX | E13.6 | Flux of SR2G(9) channel from LET-II | | SR2G(9)_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of SR2G(9) channel | | SR2H(9)_FLUX | E13.6 | Flux of SR2H(9) channel from LET-II | | SR2H(9)_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of SR2H(9) channel | #####The coincidence logic for each flux column is described as below: * Column 2 = (SR2E(9) / 1.500E-02) SR2E(9) = ^S1.S2(5).^S2(A).^S3(9) * Column 4 = (SR2F(9) / 1.500E-02) SR2F(9) = ^S1.S2(6).^S2(A).^S3(9) * Column 6 = (SR2G(9) / 1.500E-02) SR2G(9) = ^S1.S2(7).^S2(A).^S3(9) * Column 8 = (SR2H(9) / 1.500E-02) SR2H(9) = ^S1.S2(8).^S2(A).^S3(9) P11_CRT_JUP_ENC_15MIN_LET_I.TAB contains LET-I proton and ion flux measurements. | Column Name | Column Format | Column Description | |------------------------|-------|-------------------------------------| | START_TIME | A23 | Start time of each averaging interval in yyyy-mm-ddThh:mm:ss.sss | | R10D_FLUX | E13.6 | Flux of R10D channel from LET-I | | R10D_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R10D channel | | R10E_FLUX | E13.6 | Flux of R10E channel from LET-I | | R10E_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R10E channel | | R10F_FLUX | E13.6 | Flux of R10F channel from LET-I | | R10F_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R10F channel | | R10G_FLUX | E13.6 | Flux of R10G channel from LET-I | | R10G_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R10G channel | | R13AB_FLUX | E13.6 | Flux of R13AB channel from LET-I | | R13AB_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R13AB channel | #####The coincidence logic for each flux column is described as below: * Column 2 = (R10D / 1.530E+00) R10D = D1(4) * Column 4 = (R10E / 1.530E+00) R10E = D1(5) * Column 6 = (R10F / 1.530E+00) R10F = D1(6) * Column 8 = (R10G / 1.530E+00) R10G = D1(7) * Column 10 = (R13A / 1.550E-01) - (R13B / 1.550E-01) R13A = D1.D2.E2.^F R13B = D1.D2.SIGMA-D.E4.^F P11_CRT_JUP_ENC_15MIN_LET_IIB.TAB contains LET-II proton and heavy ion flux measurements. | Column Name | Column Format | Column Description | |------------------------|---------------|------------------------------------------------------------------| | START_TIME | A23 | Start time of each averaging interval in yyyy-mm-ddThh:mm:ss.sss | | R15AD_FLUX | E13.6 | Flux of R15AD channel from LET-II | | R15AD_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R15AD channel | | SR2BD_FLUX | E13.6 | Flux of SR2BD channel from LET-II | | SR2BD_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of SR2BD channel | | R15BD_FLUX | E13.6 | Flux of R15BD channel from LET-II | | R15BD_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R15BD channel | #####The coincidence logic for each flux column is described as below: * Column 2 = (R15A / 1.500E-02) - (R15D / 1.500E-02) R15A = S1(1).^S2.^S2(A).^S3 R15D = S1(4).^S2.^S2(A).^S3 * Column 4 = (SR2B(9) / 1.500E-02) - (R15D / 1.500E-02) SR2B(9) = S1(6).^S2.^S2(A).^S3(9) R15D = S1(4).^S2.^S2(A).^S3 * Column 6 = (R15B / 1.500E-02) - (R15D / 1.500E-02) R15B = S1(2).^S2.^S2(A).^S3 R15D = S1(4).^S2.^S2(A).^S3 P11_CRT_JUP_ENC_15MIN_LET_IIC.TAB contains LET-II proton and heavy ion flux measurements. | Column Name | Column Format | Column Description | |------------------------|---------------|------------------------------------------------------------------| | START_TIME | A23 | Start time of each averaging interval in yyyy-mm-ddThh:mm:ss.sss | | R15CD_FLUX | E13.6 | Flux of R15CD channel from LET-II | | R15CD_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R15CD channel | | R16AC_FLUX | E13.6 | Flux of R16AC channel from LET-II | | R16AC_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R16AC channel | | R16BC_FLUX | E13.6 | Flux of R16BC channel from LET-II | | R16BC_FLUX_UNCERTAINTY | E13.6 | Flux uncertainty of R16BC channel | #####The coincidence logic for each flux column is described as below: * Column 2 = (R15C / 1.500E-02) - (R15D / 1.500E-02) R15C = S1(3).^S2.^S2(A).^S3 R15D = S1(4).^S2.^S2(A).^S3 * Column 4 = (R16A / 1.500E-02) - (R16C / 1.500E-02) R16A = S1.S2(1).^S2(A).^S3 R16C = S1.S2(3).^S2(A).^S3 * Column 6 = (R16B / 1.500E-02) - (R16C / 1.500E-02) R16B = S1.S2(2).^S2(A).^S3 R16C = S1.S2(3).^S2(A).^S3" *** ####Data Coverage and Quality Data flag value is -1.0 in this collection. This collection generally covers the Pioneer 11 Jupiter encounter period from 11/26/1974 00:00:00 to 09/03/1979 18:45:00. Data gaps are listed as below: | File name | Data Gap Intervals | |-------------------------------|-------------------------------------| | P11_CRT_JUP_15MIN_HET.TAB | 1974-12-01 23:45 - 1974-12-04 22:00 | | P11_CRT_JUP_15MIN_LET_IIA.TAB | 1974-12-01 23:45 - 1974-12-03 09:00 | | P11_CRT_JUP_15MIN_LET_I.TAB | 1974-12-01 23:45 - 1974-12-03 08:00 | | P11_CRT_JUP_15MIN_LET_IIB.TAB | 1974-12-09 07:45 - 1974-12-09 21:45 | | P11_CRT_JUP_15MIN_LET_IIC.TAB | 1974-12/01 23:45 - 1974-12-03 08:00 | | P11_CRS_SAT_ENC_GRP1_15MIN.TAB| 1979-08/31 23:45 - 1979-09/01 19:00 | | P11_CRS_SAT_ENC_GRP2_15MIN.TAB| 1979-08/31 23:45 - 1979-09/01 19:00 | | P11_CRS_SAT_ENC_GRP3_15MIN.TAB| 1979-08/31 23:45 - 1979-09/01 19:00 | | P11_CRS_SAT_ENC_GRP4_15MIN.TAB| 1979-08/31 23:45 - 1979-09/01 19:00 |