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Mars Odyssey >> MAR

Mars Odyssey-Mars-MAR
ODY-M-MAR-3-RDR-CALIBRATED-DATA-V1.0	PDS 3 CERTIFIED

Start Time: 2001-04-23 14:00:00

Calibrated data and supporting documentation from the 2001 Mars Odyssey mission to Mars, including MARIE, ephemeris, and SPICE data.

Citiation Information

Title	Mars Odyssey-Mars-MAR
Publisher	NASA Planetary Data System
doi	https://doi.org/10.17189/1519763

Top/ GEOMETRY /

GEOMINFO.TXT

M01_MARIE_V10

Start Time:

Stop Time:

"N/A"

M01_MARIE_V10.TI

MARS_IAU2000_V0

Start Time:

Stop Time:

"N/A"

MARS_IAU2000_V0.TPC

ODY_TRAJ_01

Start Time:	2001-04-08T00:00:00.000Z	Stop Time:	2002-03-31T23:59:00.000Z
Trajectory data for the Mars Odyssey spacecraft are provided in three coordinate systems (planetocentric J2000, MSE, and MSO). During the cruise phase (2001-04-08 to 2001-10-24), the spacecraft position is provided given every hour. During aerobraking and mapping, position vectors are provided every minute. All distances are provided in units of Mars radii where 1 Rm = 3397 km. Angles are provided in units of degrees, and the local hour angle field is given in units of decimal hours. The planetocentric J2000 coordinate system uses the IAU 2000 definition of the Mars planetary constants [1]. Both the current parameter definitions and the changes from previous values are described in the file MARS_IAU2000_V0.TPC, and references contained therein, which is located in the GEOMETRY directory of this archive volume. The trajectory parameters associated with this coordinate system are Range, Latitude, and Longitude. Range is measured from the Mars center of mass to the spacecraft. Latitude is the angle between the Mars equatorial plane and the line connecting the Mars center of mass and the spacecraft. Positive values indicate that the spacecraft is 'above' or 'north' of the equator. Longitude is measured east from the prime meridian. The Mars Solar Equatorial (MSE) coordinate system is defined such that the Z-axis lies along the Mars rotational axis (positive in the direction of angular momentum) and the X-Z plane contains the instantaneous Mars->Sun vector. Positive X is towards the Sun. The Y axis completes the right handed set, and points towards 'dusk'. The Mars Solar Orbital (MSO) coordinate system is defined such that the X axis points from the instantaneous Mars center of mass to the Sun's center of mass (positive towards the Sun). The X-Y plane is the orbital plane of Mars about the Sun, and the Z axis is parallel to the normal of the orbital plane. Positive Z is taken 'above' or 'north' of the orbital plane, and positive Y opposes the Mars velocity vector. This coordinate system is sometimes referred to a Sun-State coordinates since the principal vectors are the components of the state vector of the Sun as viewed from Mars. Local time definition: Sun ^ \| noon Planetocentric 12:00 Equatorial Projection \| \| \| \| Mars * * / \| * (dusk) 18:00 -------------\|--------------- 06:00 (dawn) * \|\ * * * * \| \ \| \ \| \ \|-HA--\ 00:00 midnight Local hour angle is the angle (HA) between the observer's (Odyssey) sub-Mars meridian and the anti-sunward meridian, measured in the Martian equatorial plane in the direction of planetary rotation. Local time is the conversion of the local hour angle into units of time by using the conversion factor that equates one hour to fifteen degrees of longitude. Local time values are provided here in units of decimal hours. ASCII Table Structure: name format description _______________________________________________________________________ Time A24 Spacecraft event time (UT) of this record Range F10.3 Odyssey range from the Mars center of mass (Rm) Latitude F8.3 Odyssey planetocentric latitude (deg) Longitude F8.3 Odyssey planetocentric (east) longitude (deg) Local Time F8.3 Odyssey local time relative to Mars (hours) X_MSE F10.3 X component of Odyssey range in MSE coords (Rm) Y_MSE F10.3 Y component of Odyssey range in MSE coords (Rm) Z_MSE F10.3 Z component of Odyssey range in MSE coords (Rm) X_MSO F10.3 X component of Odyssey range in MSO coords (Rm) Y_MSO F10.3 Y component of Odyssey range in MSO coords (Rm) Z_MSO F10.3 Z component of Odyssey range in MSO coords (Rm) [1] Report of the IAU/IAG Working Group on Cartographic Coordinates and Rotational Elements of the Planets and Satellites: 2000.

ODY_TRAJ_01.TAB

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