scholarly journals COORDINATION OF PLANETARY COORDINATE SYSTEM RECOMMENDATIONS BY THE IAU WORKING GROUP ON CARTOGRAPHIC COORDINATES AND ROTATIONAL ELEMENTS – 2020 STATUS AND FUTURE

2020 ◽  
Vol XLIII-B3-2020 ◽  
pp. 1091-1097
Author(s):  
B. A. Archinal ◽  
C. H. Acton ◽  
A. Conrad ◽  
T. C. Duxbury ◽  
D. Hestroffer ◽  
...  
Keyword(s):  
Coordinate System ◽  
Working Group ◽  
Coordinate Systems ◽  
International Astronomical Union ◽  
International Astronomical ◽  
Cartographic Coordinates ◽  
Published Report ◽  
Near Term ◽  
Future Work ◽  
Community Input

Abstract. Our goal is to request input from the lunar and planetary community regarding issues of planetary coordinate systems and cartography standards. We begin with an overview of the work of the International Astronomical Union Working Group on Cartographic Coordinates and Rotational Elements. We briefly describe the operations and membership of the Working Group, some of the various uses of the recommendations it makes, our most recent (2018) published report and the recommendations therein, and the outlook for our next such report. We then consider several issues and questions regarding the future of the Working Group and regarding planetary cartography and planetary data spatial infrastructure in general. This includes possible near-term projects, how we and others might collect and consider community input and includes some ideas regarding possible outcomes or future work that will need to be addressed by the Working Group or other organizations.

2.2. Working Group 2: Conceptual Definitions of Reference Coordinate Systems for Earth Dynamics

1975 ◽  
Vol 26 ◽  
pp. 21-26
Keyword(s):  
Coordinate System ◽  
Working Group ◽  
General Character ◽  
Coordinate Systems ◽  
Reference Coordinate System ◽  
Group 2 ◽  
Definition Of ◽  
Earth Dynamics

An ideal definition of a reference coordinate system should meet the following general requirements:1. It should be as conceptually simple as possible, so its philosophy is well understood by the users.2. It should imply as few physical assumptions as possible. Wherever they are necessary, such assumptions should be of a very general character and, in particular, they should not be dependent upon astronomical and geophysical detailed theories.3. It should suggest a materialization that is dynamically stable and is accessible to observations with the required accuracy.

scholarly journals Proceedings of the Joint Discussion: Parameters of the Earth's Gravitational Field

1966 ◽  
Vol 12 (2) ◽  
pp. 607-609
Author(s):  
A. H. Cook
Keyword(s):  
Gravitational Field ◽  
Executive Committee ◽  
Working Group ◽  
General Assembly ◽  
International Astronomical Union ◽  
Earth’S Gravitational Field ◽  
International Astronomical ◽  
Astronomical Constants

The Chairman, W. Fricke, President of Commission 4, opened the Joint Discussion by drawing attention to the purpose and proposed procedure for the meeting. The Joint Discussion had been arranged by the Executive Committee of the Union in order to avoid the necessity for separate discussions by each Commission that was affected by the Report of the Working Group on the IAU System of Astronomical Constants. The Organizing Committee therefore proposed the following resolution:‘The members of the IAU at this Joint Discussion recommend to the Executive Committee that the following resolution be put before the General Assembly: “The International Astronomical Union endorses the final list of constants prepared by the Working Group on the System of Astronomical Constants and recommends that it be used in the national and international astronomical ephemerides at the earliest practicable date.’”

scholarly journals Proceedings of the Joint Discussion: Arguments in Favor of the Revision of the Conventional System of Astronomical Constants

1966 ◽  
Vol 12 (2) ◽  
pp. 604-606
Author(s):  
W. Fricke
Keyword(s):  
Executive Committee ◽  
Working Group ◽  
General Assembly ◽  
Conventional System ◽  
International Astronomical Union ◽  
International Astronomical ◽  
Astronomical Constants

The Chairman, W. Fricke, President of Commission 4, opened the Joint Discussion by drawing attention to the purpose and proposed procedure for the meeting. The Joint Discussion had been arranged by the Executive Committee of the Union in order to avoid the necessity for separate discussions by each Commission that was affected by the Report of the Working Group on the IAU System of Astronomical Constants. The Organizing Committee therefore proposed the following resolution:‘The members of the IAU at this Joint Discussion recommend to the Executive Committee that the following resolution be put before the General Assembly: “The International Astronomical Union endorses the final list of constants prepared by the Working Group on the System of Astronomical Constants and recommends that it be used in the national and international astronomical ephemerides at the earliest practicable date.’”

scholarly journals Working Group on Cartographic Coordinates and Rotational Elements

2005 ◽  
Vol 1 (T26A) ◽  
pp. 181-181
Author(s):  
Kennet P. Seidelman ◽  
M.F. A'HEARN ◽  
D.P. CRUIKSHANK ◽  
J.L. HILTON ◽  
H.U. KELLER ◽  
...  
Keyword(s):  
Celestial Mechanics ◽  
Rotation Rate ◽  
Working Group ◽  
Web Site ◽  
Polar Axis ◽  
The Sun ◽  
Coordinate Systems ◽  
Cartographic Coordinates ◽  
Dynamical Astronomy ◽  
The Mean

The 2003 report of the IAU/IAG Working Group on Cartographic Coordinates and Rotational Elements has appeared in Celestial Mechanics and Dynamical Astronomy(2005)volume 91, part 3–4, pages 203–215. The Working Group continues to maintain and update the information for cartographic coordinates and rotational elements for the Sun, Moon, planets, satellites, asteroids, and comets. A report is published treannually. A web site is maintained at http://extranet.astrogeology.wr.usgs.gov/Projects/WGCCRE with the up-to-date information. It is anticipated that the next report will include updates for Saturn (rotation rate) and all of the Saturnian moons, additions for the newly visited comets and asteroids, and a clarification of the Moon's coordinate systems (the mean Earth/polar axis system needs to be defined more precisely).

scholarly journals Issues of Time for Reference Systems

1993 ◽  
Vol 156 ◽  
pp. 357-362
Author(s):  
P. K. Seidelmann
Keyword(s):  
General Assembly ◽  
Coordinate Systems ◽  
International Astronomical Union ◽  
Sidereal Time ◽  
Coordinate Time ◽  
International Astronomical ◽  
Definition Of ◽  
T Values ◽  
Barycentric Coordinate ◽  
Astronomical Constants

At the International Astronomical Union General Assembly in 1991 the terminologies Geocentric Coordinate Time (TCG) and Barycentric Coordinate Time (TCB) were introduced as the time coordinates of four dimensional geocentric and barycentric coordinate systems, respectively. The reasons for these time-like arguments and their applications will be discussed. The relationships between the different time-like arguments will be discussed along with their applications and relationships to the astronomical constants.Since these time-like arguments have secular differences, there are new issues to be resolved. These new issues include the definition of the epoch J2000.0, relationship between mean and apparent sidereal time, the time-like argument for specifying constants, the definition and future use of ephemeris time, delta T values and the transition to, or future use of, TCG, TCB and TDB.

scholarly journals Proceedings of the Joint Discussion: Masses of the Principal Planets

1966 ◽  
Vol 12 (2) ◽  
pp. 609-614
Author(s):  
G. M. Clemence
Keyword(s):  
Executive Committee ◽  
Working Group ◽  
General Assembly ◽  
International Astronomical Union ◽  
International Astronomical ◽  
Astronomical Constants

The Chairman, W. Fricke, President of Commission 4, opened the Joint Discussion by drawing attention to the purpose and proposed procedure for the meeting. The Joint Discussion had been arranged by the Executive Committee of the Union in order to avoid the necessity for separate discussions by each Commission that was affected by the Report of the Working Group on the IAU System of Astronomical Constants. The Organizing Committee therefore proposed the following resolution:‘The members of the IAU at this Joint Discussion recommend to the Executive Committee that the following resolution be put before the General Assembly: “The International Astronomical Union endorses the final list of constants prepared by the Working Group on the System of Astronomical Constants and recommends that it be used in the national and international astronomical ephemerides at the earliest practicable date.’”

2.3. Working Group 3: Practical Realization of the Reference Coordinate Systems

1975 ◽  
Vol 26 ◽  
pp. 27-38
Keyword(s):  
Coordinate System ◽  
Working Group ◽  
Fundamental Constants ◽  
Practical Realization ◽  
Coordinate Systems ◽  
Reference Coordinate System ◽  
Measuring Techniques ◽  
Group 3 ◽  
Computational Procedures ◽  
Better Than

For a reference coordinate system to be useful to Blarth dynamics it must clearly display the phenomena of interest in a systematic and unambiguous way, free of detailed assumptions. For a clear display, it is absolutely essential that the system be realized to an accuracy substantially better than has been obtained heretofore. This demands not only improved measuring techniques and instruments, but also precise specification of computational procedures, assumptions, fundamental constants, etc., and meticulous implementation.

scholarly journals DIVISION C COMMISSION 55: COMMUNICATING ASTRONOMY WITH THE PUBLIC

2015 ◽  
Vol 11 (T29A) ◽  
pp. 209-218
Author(s):  
Lars Lindberg Christensen ◽  
Pedro Russo ◽  
Richard Tresch Fienberg ◽  
Sze-leung Cheung ◽  
Ian Robson ◽  
...  
Keyword(s):  
Working Group ◽  
Active Role ◽  
Public Outreach ◽  
International Astronomical Union ◽  
The Public ◽  
The Past ◽  
International Astronomical ◽  
The World ◽  
History Of ◽  
Education Outreach

The IAU Division C Commission 55, Communicating Astronomy with the Public, played an active role in Union affairs within Division C, Education, Outreach and Heritage. The International Astronomical Union (IAU) vested considerable responsibility for its public outreach efforts in Commission 55 (C55), Communicating Astronomy with the Public. This article briefly recounts the origin and history of C55 over the past decade, and describes the work of C55 until it became Division C Commission C.C2 in 2015. As stated on our website, http://www.communicatingastronomy.org, C55 was founded on the principle that “it is the responsibility of every practising astronomer to play some role in explaining the interest and value of science to our real employers, the taxpayers of the world.” While this was true a decade ago, when the Working Group that eventually became C55 first took shape, it is even more true today, when funding for the astronomical sciences (and science more generally) is under threat on nearly every continent.

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