Custom Optics vs Modified COTS for Small Spacecraft : The Build vs . Rebuild Decision

نویسندگان

  • Doug Sinclair
  • John Enright
  • Tom Dzamba
  • Thomas M. C. Sears
چکیده

This paper provides a comparative case study detailing parallel experiences with both a modified commercial off-theshelf lens and a custom lens for small satellite applications. These lens designs were employed in two successive hardware generations of the ST-16 star tracker. The two designs are compared experimentally, measuring effective aperture, photometric efficiency, point-spread function and thermal stability. We show that opting for custom optical design can effectively remedy deficiencies in performance but often at the expense of technical and budgetary risks.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Position Paper for the International Workshop on Reuse Economics, Austin, Texas 4.16.2002 COTS-based Systems and Make vs. Buy Decisions: the Emerging Picture

The conventional rationale for using COTS (commercial off-theshelf) components is that the more a software system is built from COTS products, the lower the cost of initial development. Less understood is that during the long term sustainment phase—from deployment through retirement—the cost of maintenance of a COTS-based system (CBS) generally increases as the number of COTS products used incr...

متن کامل

Software component decision-making: In-house, OSS, COTS or outsourcing - A systematic literature review

Context: Component-based software systems require decisions on component origins for acquiring components. A component origin is an alternative of where to get a component from. Objective: To identify factors that could influence the decision to choose among different component origins and solutions for decision-making (For example, optimization) in the literature. Method: A systematic review s...

متن کامل

New Hybrid Cascaded Multilevel Inverter

This paper proposes a single-phase five-level inverter with a modified pulse width-modulated (PWM)control scheme. The modified pulse width-modulation technique is developed to reduce switching loss.Also, the proposed multilevel inverter can reduce the requirement of power switches compared to aconventional cascaded multilevel inverter. The modes of operation, control signals, and operatingprinc...

متن کامل

Language Skill-Task Corollary: The Effect of Decision-Making vs. Jigsaw Tasks on Developing EFL Learners’ Listening and Speaking Abilities

Task-based language Teaching (TBLT) has occupied the pertinent literature for some long years. However, the role of specific task type in developing specific skill type seems to be amongst the intact issues in the literature. To shed more light on this issue, the present study was conducted to compare the effect of jigsaw and decision-making tasks on improving listening and speaking abilities o...

متن کامل

Custom vs. Vendor-Integrated COTS Software

The Generic Enterprise Ensemble (GEE) developed by the COTS-Based Systems initiative at the Software Engineering Institute is designed to be a generic approach to building Enterprise Information systems that are distributed, transaction-based and secure. Two GEE variants were developed: one by integrating “latest and greatest” components from leading vendors and one using Enterprise JavaBeans (...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015