 |
| Titel |
On the potential of lunar observations in regular geodetic VLBI sessions |
| VerfasserIn |
Grzegorz Klopotek, Thomas Hobiger, Rüdiger Haas |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250137652
|
| Publikation (Nr.) |
 EGU/EGU2017-433.pdf |
|
|
|
|
|
| Zusammenfassung |
| Artificial radio sources on the surface of the Moon enable us to observe lunar based
transmitters with geodetic VLBI. Although during the last years a few dedicated VLBI
experiments have already been carried out, the question still remains how and to what extend
new information can be derived from observing such targets. Therefore, we perform Monte
Carlo simulations using the c5++ software in order to evaluate how the inclusion of lunar
observations into regular VLBI schedules would impact classical Earth-related target
parameters of geodetic VLBI such as station coordinates and Earth Orientation Parameters, as
well as how it would extend the possibilities to determine selenoidic parameters.
Our study is based on modified IVS-R1 observing schedules, originally created by
the International VLBI Service for Geodesy and Astrometry (IVS) to determine
Earth Orientation Parameters, thus representing state-of-the-art VLBI observing
programs.
Based on our simulations, we demonstrate that an artificial radio source on the surface of
the Moon can be located with both, accuracy and precision of better than 50 cm when
observed along with quasars in the regular IVS-R1 session schedules. Moreover, we show
that geodetic VLBI has the potential to improve our knowledge of lunar physical
models and/or help to verify or update lunar ephemerides. We will discuss how the
quality and quantity of lunar observations affect the uncertainty of the position of
a non-moving artificial radio source located on the surface of the Moon and we
highlight the factors limiting the determination of its position. Furthermore, we will
reveal the impact of Moon VLBI observations on the determination of the Earth
Orientation Parameters and VLBI station positions. We will also test the concept of VLBI
lunar observations with simulations that reflect VGOS performance in terms of
observation precision, number of scans and future network configurations. Thus,
our simulations will provide valuable insights that motivate the scheduling and
observation of lunar targets along with standard quasar targets and therefore are
expected to stimulate new observing concepts for geodesy as well as planetary
science. |
|
|
|
|
|
|