Ikaros orbit data provided by Prof. O. Mori in March 2021.


TDM_datalist_ver2.xlsx -- Explanation of the TDM file-name convention and the file list.
OEM       -- Orbit Ephemeris Message (OEM) format files.
tdmK34    -- TDM files taken at Kagoshima 34m antenna.  
tdmU64    -- TDM files taken at Usuda 64m antenna  

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The file format of Orbit Ephemeris Message (OEM) and Tracking Data Message (TDM) files
complies with CCSDS RECOMMENDED STANDARD FOR:
    ORBIT DATA MESSAGES (CCSDS 502.0-B-2): https://public.ccsds.org/Pubs/502x0b2c1e2.pdf
    TRACKING DATA MESSAGE (CCSDS 503.0-B-2): https://public.ccsds.org/Pubs/503x0b2c1.pdf

The OEM and TDM files format summary:
    The files consist of headers, metadata, and data sections.
    The header section contains "CCSDS_OEM_VERS", "CREATION_DATE" and "ORIGINATOR" keywords.
    The metadata is provided in block enclosed by the "META_START" and "META_STOP" keywords.
    The formats of the data sections are as follows:

OEM data format:
    Each set of ephemeris data is provided on each line in the following format:
        Epoch, X, Y, Z, Vx, Vy, Vz
    Note:
        The time system of epoch is specified by the TIME_SYSTEM keyword in the metadata.
	Units are km and km/s for position and velocity components, respectively.
	See "5 ORBIT EPHEMERIS MESSAGE (OEM)" in the CCSDS STANDARD documentation
	for more detailed description.

TDM data format:
    The tracking data section is enclosed by the "DATA_START" and "DATA_STOP" keywords.
    Each set of tracking data is provided on each line in the following format:
        keyword  =  timetag  measurement
    Note:
        See "3.4 TDM DATA SECTION (GENERAL SPECIFICATION)" in the CCSDS STANDARD documentation
        for more detailed description.

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History:
  February 8th, 2022 --- Updated this file.