Data Access
This Data Set contains 10 min Cadence Proton and Helium Spin-Averaged Coincidence Fluxes from the COSPIN Anisotropy Telescopes (AT1 and AT2). The two Telescopes differ only by their Orientation with respect to the Spacecraft Spin Axis. The Parameter Keys in the Parameter Level Segments below are specifically relevant to the UFA accessible Versions of the Data.
Version:2.2.9
This Data Set contains 10 min Cadence Proton and Helium Spin-Averaged Coincidence Fluxes from the COSPIN Anisotropy Telescopes (AT1 and AT2). The two Telescopes differ only by their Orientation with respect to the Spacecraft Spin Axis. The Parameter Keys in the Parameter Level Segments below are specifically relevant to the UFA accessible Versions of the Data.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | CoInvestigator TeamLeader | spase://SMWG/Person/Andre.Balogh | |||
| 2. | CoInvestigator DataProducer | spase://SMWG/Person/Silvia.Dalla | |||
| 3. | ArchiveSpecialist | spase://SMWG/Person/Cecil.Tranquille |
Published Description of the COSPIN Instrumentation, J.A. Simpson et al., Astron. Astrophys. Suppl. Ser. 92, 365-399, 1992. See especially Section 4.2 for a detailed Description of the Anisotropy Telescopes, AT. An electronic Copy of this Paper is available at http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?1992A%26AS...92..365S&defaultprint=YES&filetype=.pdf. Note that in this Paper, the Pointing Directions of the AT1 and AT2 are interchanged. The correct Pointing Directions are given below.
The User Notes File at the Ulysses Final Archive (UFA) describes the Format of the ASCII Data Files for the COSPIN dual Anisotropy Telescopes, AT1 and AT2, 10 min Average Proton and Helium Spin-Averaged and Sectored Fluxes
Parent Directory containing downloadable .zip compressed Yearly Subdirectories with Naming Convention cosatNYY.zip. Here and below N=1 or 2 to identify which of the two identical AT Telescopes is the Source of the Data and YY indicates the two digit Year corresponding to the Data in the Subdirectory. Each Subdirectory contains Daily ASCII Files with Naming Convention ucosatNrYYDOY.uly where N and YY are as above, and DOY is the three digit Day of Year (January 1 = 1). Each File contains nominally 1 min Averages of the COSPIN/AT Spin-Averaged and Sectored Fluxes based on Counting Rates which respond primarily to Protons and Helium Nuclei. Electron Response is strongly suppressed by Discriminator Thresholds set on the 30 micron thick Front Detector, D1, which is required to fire for all Events registered by the Counting Rates. Times given are the Center Point of the nominal 10 min averaging Interval, and the Data Entries are given in Units of Flux, (cm^2 s sr MeV)^-1. (N.B. MeV not MeV/n) For Channels which respond to both Protons and Helium, the Flux is computed using the Energy Range appropriate for Protons, normally the dominant Species in the Channel. For each AT, the Data are presented in the following Format, where Channels are named as in Table 5 of Simpson et al., 1992 and the Energy Ranges are given in MeV (not MeV/n). Energies listed are in the Frame of the Spacecraft. In the Range of Energies measured by the AT Telescopes, the Energy Shifts resulting from Convection of the Nuclei by the Solar Wind are significant, and for Study of Anisotropies in the Solar Wind Frame, appropriate Corrections are necessary. Telescope AT1 points at 60° to the Spacecraft Spin Axis and Telescope AT2 points at 145° to the Spacecraft Spin Axis. The Ulysses Spacecraft Spin Axis is maintained within 1° of Earth pointing at all Times. -------------------------------------------------------------------- Field Fortran Definition Protons Helium Format (MeV) (MeV) -------------------------------------------------------------------- 1 I4 four digit Year, e.g. 1992 2 I3 Day of Year (January 1 = 1) 3 I2 Hour of Day 4 I2 Minute of Hour 5 I2 Second of Minute 6 E11.4 A1_N Spin-Averaged 0.7-0.9 2.3-2.5 7 E11.4 A2_N Spin-Averaged 0.9-1.3 2.5-2.7 8 E11.4 A3_N Spin-Averaged 1.3-2.2 2.7-3.0 9 E11.4 A4_N Spin-Averaged 2.2-3.6 no resp 10 E11.4 A5_N Spin-Averaged 3.6-6.5 24.0-28.0 11 E11.4 A38_N Spin-Averaged no resp 3.0-7.5 12 E11.4 A39_N Spin-Averaged no resp 7.5-12.0 13 E11.4 A40_N Spin-Averaged no resp 12.0-26.0 14 E11.4 A6_N (A3 Sector 1) 1.3-2.2 2.7-3.0 15 E11.4 A7_N (A3 Sector 2) " " 16 E11.4 A8_N (A3 Sector 3) " " 17 E11.4 A9_N (A3 Sector 4) " " 18 E11.4 A10_N (A3 Sector 5) " " 19 E11.4 A11_N (A3 Sector 6) " " 20 E11.4 A12_N (A3 Sector 7) " " 21 E11.4 A13_N (A3 Sector 8) " " 22 E11.4 A14_N (A4 Sector 1) 2.2-3.6 no resp 23 E11.4 A15_N (A4 Sector 2) " " 24 E11.4 A16_N (A4 Sector 3) " " 25 E11.4 A17_N (A4 Sector 4) " " 26 E11.4 A18_N (A4 Sector 5) " " 27 E11.4 A19_N (A4 Sector 6) " " 28 E11.4 A20_N (A4 Sector 7) " " 29 E11.4 A21_N (A4 Sector 8) " " 30 E11.4 A22_N (A5 Sector 1) 3.6-6.5 24.0-28.0 31 E11.4 A23_N (A5 Sector 2) " " 32 E11.4 A24_N (A5 Sector 3) " " 33 E11.4 A25_N (A5 Sector 4) " " 34 E11.4 A26_N (A5 Sector 5) " " 35 E11.4 A27_N (A5 Sector 6) " " 36 E11.4 A28_N (A5 Sector 7) " " 37 E11.4 A29_N (A5 Sector 8) " " The actual Accumulation Intervals contributing to an Average consist of an Integral Number of Telemetry Subcomm Sequences, and correspond to all Subcomm Sequences which Start in the nominal 10 min reporting Interval. The minimum Time corresponding to one Subcomm Sequence is 256 s at 1024 bps, the most common Science Telemetry Rate. Thus the actual Start Time of the Accumulation may be up to 256 s later than the Start Time of the nominal Interval. Similarly, the End Time of the Accumulation may extend up to 256 s beyond the End of the nominal Interval. These Data are therefore not useful for highly accurate Timing Studies. Information on the Definition the Spin Sectors and the sectoring Process is given below in the Description of the A3 Sectored Data (Channels 14-21 in the Table above).
AT1 Data Access via FTP in CDF Format from SPDF
AT1 Data Access via HTTP in CDF Format from SPDF
Subset, Plot, List via CDAWeb
AT1 Data Access via FTP in ASCII Format from SPDF
AT1 Data Access via HTTP in ASCII Format from SPDF
AT2 Data Access via FTP in CDF Format from SPDF
AT2 Data Access via HTTP in CDF Format from SPDF
Subset, Plot, List via CDAWeb
AT2 Data Access via FTP in ASCII Format from SPDF
AT2 Data Access via HTTP in ASCII Format from SPDF
Nominal Midpoint Time for the Average given in Year, Day of Year, Hour, Minute, Second.
Nominal 10 min average ATN Spin-Averaged Flux based on Counting Rate A1_N responding primarily to 0.7-0.9 MeV Protons.
Nominal 10 min average ATN Spin-Averaged Flux based on Counting Rate A2_N responding primarily to 0.9-1.3 MeV Protons.
Nominal 10 min average ATN Spin-Averaged based on Counting Rate A3_N responding primarily to 1.3-2.2 MeV Protons.
Nominal 10 min average ATN Spin-Averaged Flux based on Counting Rate A4_N responding to 2.2-3.6 MeV Protons.
Nominal 10 min average ATN Spin-Averaged Flux based on Counting Rate A5_N responding primarily to 3.6-6.5 MeV Protons.
Nominal 10 min average ATN Spin-Averaged Flux based on Counting Rate A38_N responding primarily to 3.0-7.5 MeV Helium Nuclei (Alpha Particles).
Nominal 10 min average ATN Spin-Averaged Counting Rate responding primarily to 7.5-12.0 MeV Helium Nuclei (Alpha Particles).
Nominal 10 min average ATN Spin-Averaged Flux based on Counting Rate A40_N responding primarily to 12.0-26.0 MeV Helium Nuclei (Alpha Particles).
Nominal 10 min average ATN eight-sectored Fluxes based on the Counting Rate A3_NS responding primarily to 1.3-2.2 MeV Protons. The Rate has eight Elements, each corresponding to a 45° Range of the Spacecraft Spin Plane. The Start of Sector 1 (0°) is coincident with the Spacecraft generated Sun Pulse, and the Start of each subsequent Sector is shifted by 45° with respect to the preceding Sector. For example, A3_N1 covers the Azimuthal Range 0° to 45°, A3_N2 covers the Azimuthal Range 45° to 90°, etc. In each Sector, Counts are registered only when the Axis of the Telescope View Cone is within that Sector. Data from multiple Spacecraft Spins contribute to the Fluxes recorded for each Sector, and the total Accumulation Time for the Set of A3_N1-A3_N8 Fluxes is required to be an Integral Number of Spacecraft Spins. Therefore the total Accumulation Time in each of the eight Sectors is one Eighth of the total Time Interval for the Average.
Nominal 10 min average ATN eight-sectored Proton Fluxes based on the Counting Rate A4_NS responding primarily to 2.2-3.6 MeV Protons. The Rate has eight Elements, each corresponding to a 45° Range of the Spacecraft Spin Plane. The Start of Sector 1 (0°) is coincident with the Spacecraft generated Sun Pulse, and the Start of each subsequent Sector is shifted by 45° with respect to the preceding Sector. For example, A4_N1 covers the Azimuthal Range 0° to 45°, A4_N2 covers the Azimuthal Range 45° to 90°, etc. In each Sector, Counts are registered only when the Axis of the Telescope View Cone is within that Sector. Data from multiple Spacecraft Spins contribute to the Fluxes recorded for each Sector, and the total Accumulation Time for the Set of A4_N1-A4_N8 Fluxes is required to be an Integral Number of Spacecraft Spins. Therefore the total Accumulation Time in each of the eight Sectors is one Eighth of the total Time Interval for the Average.
Nominal 10 min average ATN eight-sectored Fluxes based on Counting Rate A5_NS responding primarily to 3.6-6.5 MeV Protons. The Rate has eight Elements, each corresponding to a 45° Range of the Spacecraft Spin Plane. The Start of Sector 1 (0°) is coincident with the Spacecraft generated Sun Pulse, and the Start of each subsequent Sector is shifted by 45° with respect to the preceding Sector. For example, A5_N1 covers the Azimuthal Range 0° to 45°, A5_N2 covers the Azimuthal Range 45° to 90°, etc. In each Sector, Counts are registered only when the Axis of the Telescope View Cone is within that Sector. Data from multiple Spacecraft Spins contribute to the Fluxes recorded for each Sector, and the total Accumulation Time for the Set of A5_N1-A5_N8 Fluxes is required to be an Integral Number of Spacecraft Spins. Therefore, the total Accumulation Time in each of the eight Sectors is one Eighth of the total Time Interval for the Average.