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3 min read
What is the ads?
The Astrophysics Data System (ADS) is a NASA-funded project which maintains three bibliographic databases containing more than 5.6 million records. It is an online archive of astronomical, astrophysical and physics literature.
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What is the meaning of 10dB in electronics?
So in engineering, 10dB now represents a ten-fold increase in the power of a signal. In electronics, engineers use the term 0dBm and this refers to the power of 1mW. Other commonly used terms are dbuV where the u means micro and the V is voltage. Since the dB is a ratio as you say, "0 dB" just means "no change".
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What is NASAMS air defence system?
The NASAMS air defence system features network centric, open architecture that provides increased survivability against electronic countermeasures. The missile system can engage 72 targets simultaneously in active and passive modes.
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How many publications does the ads have?
The ADS maintains collections of scientific publications containing more than 15 million records covering publications (including arXiv e-prints) in Astronomy and Astrophysics, Planetary Sciences, and related research.
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What is the difference between 0dB and absolute DB?
Yes, so basically, 0dB is the ‘relative’ reference point. If the dB unit has a suffix, like SPL or A, it is known as ‘absolute’ because the suffix indicates the reference point. Note: With SPL, you have to also indicate at what distance from the source, the level is measured.
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What are the most recent capabilities of NASAMS?
The most recent capabilities, demonstrating NASAMS path of evolution, are the AMRAAM Extended Range missile (AMRAAM ER) and the AIM-9X-2. AMRAAM ER significantly extends the engagement volume of NASAMS, while the AIM-9X-2 is optimized for shorter ranges.
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What external resources does the ADS provide?
Integrated in its collections, the ADS provides access to a wealth of external resources, including electronic articles available from publishers’ websites, astronomical object information, data catalogs and data sets hosted by external archives.
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Why is 0dB considered full-scale?
Once a signal is in the digital domain it takes on a life of its own and 0dB remains full-scale. If you took a digital audio file (maybe from a CD or wav file) and loaded it onto another machine, the new machine would see the same binary numbers as the original machine so 0dB represents the biggest value numerically in the "digital world".
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What is NASA’s image library?
NASA’s image library, images.nasa.gov, consolidates imagery and videos in one searchable locations. Users can download content in multiple sizes and resolutions and see the metadata associated with images, including EXIF/camera data on many images.
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What does nasal mean in linguistics?
nasal 1 Of, in, or relating to the nose. 2 Linguistics Articulated by lowering the soft palate so that air resonates in the nasal cavities and passes out the nose, as in the pronunciation of the consonants (m), (n), … 3 Characterized by or resembling a resonant sound produced through the nose: a nasal whine.
