ULYSSES
Ulysses HISCALE Data Analysis Handbook
Chapter 2: HISCALE Data File Descritions and Overview
Chapter 2.2: Experiment Data Record (continued)
2.2.8 Data Specifications for HISCALE/EPAM Conversion of ARCGEN (continued)
Table 2.15 Description of differences between the HISCALE and EPAM SFDU headers as defined by the Ulysses Software Interface Specification Experiment Data Record
| Word | Bits | HISCALE Description | EPAM Description |
| 1 | 0-3 | Label Version Number - Indicates the version of Standard Formatted Data Unit (SFDU). 0001 = Base Version Code |
(same as HISCALE) |
| 1 | 4-5 | Character Set - Indicates the character representation
used within this record. 00 = Binary Type |
(same as HISCALE) |
| 1 | 6-7 | Unit Structure Type - Globally defines the gross
structural characteristics of the data unit. 00 = (constant for ULS) |
(same as HISCALE) |
| 1 | 8-15 | Start of Message Pointer - Number of bytes to where
Message contents begins. 01111100 = 124 |
(same as HISCALE) |
| 1 | 16-21 | Control Authority - Institution controlling the
contents of the remainder of the data unit. 000101 = NASA-JPL |
(Filler Bits) |
| 1 | 22-26 | System Classification - Local system responsible for
creating the secondary header. 00010 = Telemetry (DACS) 00011 = DRS |
(Filler Bits) |
| 1 | 27-31 | Secondary Header Identifier - Identifies the secondary
header type. 00010 = ULS |
(Filler Bits) |
| 2 | 0-15 | Message Unit Classification - Total length of this
record in bytes. 0001110001111100 = 7292 |
(same as HISCALE) |
| 2 | 16-23 | Originator ID - Identifies which facility originated
the secondary header. 01000010 = DACS 01000011 = DRS |
(Filler Bits) |
| 2 | 24-31 | Last Modifier ID - Identifies the system which last
modified the record. Same codes as for “Originator ID.” 01000011 = DRS |
(Filler Bits) |
| 3 | 0-7 | Major Data Class - Experiment Data Record <=> 00000101. | (same as HISCALE) |
| 3 | 8-15 | Minor Data Class - Lanzerotti Experiment <=> 00000110 | (Filler Bits) |
| 3 | 16-31 | Spacecraft Event Time - UTC that corresponds to the first valid minor frame in the EDR. Consists of a 4-byte coarse time (seconds since the beginning of January 1st, 1950, 00:00 a.m.) and a 2-byte fine time (fraction of current second). | Spacecraft Event Time - UTC that corresponds to the occurrence of the 8 x major frame pulse - time corresponds to the beginning of the 1st data collection cycle readout. Byte format is the same as HISCALE. |
| 4 | 0-31 | ||
| 5 | 0-31 | Earth Received Time - UTC that corresponds to the first valid minor frame in the EDR. Same byte format as HISCALE "Spacecraft Event Time." | (Filler Bits) |
| 6 | 0-15 | ||
| 6 | 16-23 | Sequence Reference ID - Identifies the data contained
in the SFDU to a specific segment of the flight mission sequence. (This field is unused
for ULS and is set to binary zeroes.) Mission Mode Flags - Description of how data was generated for this record. |
(Filler Bits) |
| 6 | 24 | Spacecraft Realtime/ Playback Data Flag - Indicates whether data were downlinked by the spacecraft in realtime or as a result of a tape recorder playback. 0 = Realtime data or N/A 1 = Playback data |
(same as HISCALE) |
| 6 | 25 | Real/Simulated Data Flag - Indicates whether data are
real or simulated. 0 = Real data 1 = Playback data |
(same as HISCALE) |
| 6 | 26 | System Test/MOS Flag - Indicates whether data are test
or flight generated. 0 = Test complex generated 1 = Flight (MOS) generated |
(same as HISCALE) |
| 6 | 27 | Replay Flag - Indicates if record contains replay data. 0 = Initial acquisition or not applicable 1 = Replay data Message Contents Quality Status - Indicates gross quality of the data in the secondary and tertiary headers |
(Filler Bits) |
| 6 | 28 | Data Quality Flags - Indicates if the data portion of
this record is valid or not. 0 = data valid 1 = data suspect, incomplete or invalid |
(Filler Bits) |
| 6 | 29 | Spacecraft Clock Flag - Indicates if the spacecraft
clock is valid or not. 0 = SCLK is valid 1 = SCLK is missing, incomplete or invalid |
(Filler Bits) |
| 6 | 30 | Spacecraft Event Time Flag - Indicates if SCET value is
valid or not. 0 = SCET is valid 1 = SCET is missing, incomplete or invalid |
Mission ID - Identifies the mission. MSB = 0 ACE <=> 0001011100 |
| 6 | 31 | Earth Received Time Flag - Indicates if ERT value is
valid or not. 0 = ERT is valid 1 = ERT is bad or missing |
Mission ID - Identifies the mission. Bit = 0 ACE <=> 0001011100 |
| 7 | 0-7 | Mission ID - Identifies the mission. Byte = 00000011 Ulysses <=> 00000011 |
Mission ID - Identifies the mission. Byte = 01011100LSB ACE <=> 0001011100 |
| 7 | 8-15 | Spacecraft ID - Indicates the DSN spacecraft code. | (Filler Bits) |
| 7 | 16-23 | Source ID - Indicates the DSN source station. | (Filler Bits) |
| 7 | 24-31 | Format - Indicates the specific contents of the data identified by Major and Minor Data Types. (This field is not used for ULS and is set to binary zeroes.) | (Filler Bits) |
| 8 | 0-7 | Tertiary Header Identifier - Indicates the type of
tertiary header that follows the secondary header. 00000000 = no tertiary header 00000011 = data records system header 00000010 = realtime telemetry processor (DACS) |
(same as HISCALE) 00000011 = data records system header used |
| 8 | 8-15 | Number of Data Groups - Number of contiguous data groups identified by and immediately following the SFDU headers. Constant set to binary “1” for ULS. | (same as HISCALE) |
| 8 | 16-31 | Appended Data Pointer - Displacement to first bit in the appended (secondary) test from the first bit of this header in bytes. Constant set to “0” for ULS. | (same as HISCALE) |
| 9 | 0-31 | Spacecraft Clock - Indicates the current value of the spacecraft clock. The first 32 bits reflect the actual clock value from the spacecraft telemetry, the final 16 bits are fractional portion expressed as a binary integer. | Spacecraft Clock - Value of the spacecraft clock at the occurrence of the 8 x Major Frame Pulse - indicates the beginning of the first data format of the first data collection cycle of this record. Byte format same as HISCALE. |
| 10 | 0-15 | ||
| 10 | 16-31 | Spacecraft Spin Period (PER) | (Filler Bits) |
| 11 | 0-15 | Logical Record Sequence Number - Sequential binary count of all logical records by record type written on this tape/file. The count is incremented by one after each successful write. Initially, the number is set to one. | (Filler Bits) |
| 11 | 16-19 | Format Identifier - indicates recorded data rate if PB. 0000 Engineering 64 bps 0001 Scientific 128 bps 0010 Scientific 256 bps 0011 Scientific 512 bps 0100 Engineering 1024 bps 0101 Scientific 1024 bps |
Format Identifier - indicates recorded
data rate if PB. 0001 EPAM Digital Science, H/K, 168 bps |
| 11 | 20-23 | Interleaved PB Format ID Recorded Creation Data - Actual date this record was written. This value taken from system clock. |
(Filler Bits) (same as HISCALE) |
| 11 | 24-31 | Write Date - Year (year minus 1900) | |
| 12 | 0-15 | Write Date - Day (day of year) | |
| 12 | 16-31 | Bit Error Rate - summation of the number of sync word errors detected in 10E5 bits of frame sync words displayed as a percentage (binary). | (Filler Bits) |
| 13 | 0-15 | Symbol Signal-To-Noise Ratio (SNR) | (Filler Bits) |
| 13 | 16-31 | Receiver Automatic Gain Control (AGC) | (Filler Bits) |
| 14 | 0-31 | Data Presence Indicators (DPI) Flags - 32 status flags
indicating whether minor frames 0-31 are present in this record. 0 = data present 1 = all or part of minor frame missing |
(same as HISCALE) |
| 15 | 0-31 | DPI for minor frames 32-63 | (same as HISCALE) |
| 16 | 0-31 | DPI for minor frames 64-95 | |
| 17 | 0-31 | DPI for minor frames 96-127 | |
| 18 | 0-31 | DPI for minor frames 128-159 | |
| 19 | 0-31 | DPI for minor frames 160-191 | |
| 20 | 0-31 | DPI for minor frames 192-223 | |
| 21 | 0-31 | DPI for minor frames 224-255 | |
| 22 | 0-31 | GCF Block Error Correction Indicator (ECI) Flags - 32 status flags indicating whether the GCF block from which minor frames 1-32 were derived was received in error. | (Filler Bits) |
| 23 | 0-31 | ECI for minor frames 32-63 | (Filler Bits) |
| 24 | 0-31 | ECI for minor frames 64-95 | |
| 25 | 0-31 | ECI for minor frames 96-127 | |
| 26 | 0-31 | ECI for minor frames 128-159 | |
| 27 | 0-31 | ECI for minor frames 160-191 | |
| 28 | 0-31 | ECI for minor frames 192-223 | |
| 29 | 0-31 | ECI for minor frames 224-255 | |
| 30 | 0-31 | Spin Phase - Time from last sun crossing of spacecraft x-axis | First Spin Start Time - First spin start time of the first data collection cycle of this record, in units of the S/C Clock. |
| 31 | 0-15 | ||
| 31 | 16-31 | Gaps - Total number of missing minor frames in this record. Equivalent to sum of all Data Presence Indicators that are set = 1 in this record. | (same as HISCALE) |
Next: Section 2.3 HISCALE Level 1 Files
Return to Chapter 2 Table of Contents
Return to Ulysses HISCALE Data Analysis Handbook Table of Contents
Updated 8/8/19, Cameron Crane
QUICK FACTS
Manufacturer:
ESA provided the Ulysses spacecraft, NASA provided the power
supply, and various others provided its instruments.
Mission End Date: June 30, 2009
Destination: The inner heliosphere of the sun away from the ecliptic plane
Orbit: Elliptical orbit transversing the polar regions of the sun outside of the ecliptic plane
Mission End Date: June 30, 2009
Destination: The inner heliosphere of the sun away from the ecliptic plane
Orbit: Elliptical orbit transversing the polar regions of the sun outside of the ecliptic plane