In order to simultaneously determine the values of total solar irradiance (TSI) and Earth’s radiation at top atmosphere (TOA) on board Fengyun-3F satellite, a spaceborne relative radiometer (SRR) was developed. It adopts dual-channel structure, including channel (SR) with an unobstructed field view (FOV) 1.5° Earth (ER) wide (WFOV) 95.3° diameter about 1900 km ground. Before launch, both SR ER ...

We present a new approach to digital forensic evidence acquisition and disk imaging called sifting collectors that images only those regions of a disk with expected forensic value. Sifting collectors produce a sector-by-sector, bit-identical AFF v3 image of selected disk regions that can be mounted and is fully compatible with existing forensic tools and methods. In our test cases, they have ac...

This paper studies a flight load test method for helicopter blade, including the structural force of strain gauge bridge modification, calibration and establishment equation in typical maneuvers. First, blade structure was analyzed gauges were pasted profile which considered to be important positions analysis safe helicopter. Second, Load equations obtained by ground test, would used convert ti...

The technology of integer ambiguity resolution-enabled precise-point-positioning (also referred to as PPP-AR) has been proven capable providing comparable accuracy, efficiency, and productivity long-baseline real-time kinematic positioning (RTK) during the last decade. Commercial PPP-AR services have provided by different institutions companies widely used in geodetic missions. However, usage r...

Challenges associated with rotorcraft acoustic flight prediction and validation are examined. First, an outline of a state-of-the-art rotorcraft aeroacoustic prediction methodology is presented. Components including rotorcraft aeromechanics, high resolution reconstruction, and rotorcraft acoustic prediction are discussed. Next, to illustrate challenges and issues involved, a case study is prese...