Federal Aviation Administration Commercial Space Transportation Research and Development Program

2007 ◽  
Author(s):  
Chuck Larsen
Keyword(s):  
Research And Development ◽  
Development Program ◽  
Federal Aviation Administration ◽  
Commercial Space ◽  
Transportation Research ◽  
Space Transportation

Review of Track Inspection and Maintenance Standards for Transit

2019 ◽  
Vol 2673 (12) ◽  
pp. 538-547
Author(s):  
David D. Davis ◽  
Stephen Dick ◽  
Stephen Wilk ◽  
MaryClara Jones ◽  
Yuqing Zeng
Keyword(s):  
North America ◽  
Research And Development ◽  
Urban Transportation ◽  
Development Program ◽  
Rail Transit ◽  
Technology Center ◽  
The World ◽  
Inspection And Maintenance ◽  
Transit Agencies ◽  
Transportation Research

Transportation Technology Center, Inc (TTCI) reviewed rail transit track inspection and maintenance standards in North America. These agency standards were benchmarked against similar protocols existing in other parts of the world. In addition, transit agencies were surveyed to document inspection, maintenance, and operating practices to understand variations in inspection and maintenance standards. Approximately 30 agencies participated in the survey which establishes a significant representative sample of North American transit operations. An analysis of track-related accidents was conducted to determine where changes might be required to existing standards and/or where potential gaps may exist. From this analysis, a prioritized list of recommendations was developed. The list consists of items that can be implemented immediately and also items requiring additional research and development. This research is part of the Federal Transit Administration (FTA) and Center for Urban Transportation Research (CUTR) standards development program. The program is intended to improve the safety and efficiency of rail transit operations.

scholarly journals ESA’S Space Transportation Programme

1990 ◽  
Vol 123 ◽  
pp. 333-338
Author(s):  
J. Feustel-Buechel ◽  
W. Wamsteker
Keyword(s):  
Hubble Space Telescope ◽  
Development Program ◽  
Low Earth Orbit ◽  
Second Phase ◽  
Commercial Space ◽  
To Come ◽  
Launch Systems ◽  
Commercial Applications ◽  
Definition Of ◽  
Space Transportation

The overall development of ESA’s Space Transportation Programme can be perceived in two major phases. The first phase finished with the transfer of the ARIANE 1-4 launch systems to Arianespace for utilisation and commercialization. The second phase was started after the success of the ARIANE launcher programme had created a sound basis for Europe’s space industry in the evolving commercial space transportation market. This has lead to the definition of a second phase of the launcher development program which is expected to fulfil the needs for transport into space for many years to come. The wide objectives of the program makes it not only suitable for commercial applications but can also be expected to cover the launching needs for future Space Astrophysics missions.Market studies of the future commercial space transportation needs show growing satellite masses and an increased worldwide competition. Europe therefore needs a powerful launcher with improved cost-effectiveness and improved reliability for geostationary missions. On the other hand the discussion about the optimum launcher, spacecraft size and orbits for Astronomy missions, as well as for Space Science missions in general, is still a matter under debate, as explained by Dyson elsewhere in these Proceedings. The experience obtained with IUE and EXOSAT-Observatory satellites which, due to their general user nature, do not have a rigidly preplanned observing program - seem to suggest that, at least for operational motives, high orbits appear preferable for such satellites. This is especially true as compared to the operational and planning difficulties foreseen with the recently launched Hubble Space Telescope, which is in low earth orbit (LEO). Of course, for firmly pre-scheduled observatories with a predetermined Science program, such as COBE and HIPPARCOS, this choice may not be obvious.

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