The ability to precisely emplace stand-alone payloads in hostile territory has long been on the wish list of US warfighters. This type of activity is one of the main functions of special operation forces, often conducted at great danger. Such risk can be mitigated by transitioning the manual placement of payloads over to an automated placement mechanism by the use of the Automatic Payload Deplo...

NUR 959 Trefw.: optische telecommunicatie / nietlineaire optica / optische signaalverwerking. Subject headings: optical fibre communication / nonlinear optics / optical information processing. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means without the prior written consent of the author. Summary Optical networks are evolvi...

The Chinese Hα Solar Explorer (CHASE), dubbed “Xihe”—Goddess of the Sun, was launched on October 14, 2021 as first solar space mission China National Space Administration (CNSA). CHASE is designed to test a newly developed satellite platform and acquire spectroscopic observations in waveband. Imaging Spectrograph (HIS) scientific payload satellite. It consists two observational modes: raster sc...

We address the problem of cooperative transportation of a cable-suspended payload by multiple quadrotors. In previous work, quasi-static models have been used to study this problem. However, these approaches are severely limited because they ignore the payload dynamics, and do not explicitly model the underactuation in the control problem. Thus, there are no guarantees on the payload trajectory...

1 Launch loads, both mechanical and acoustic, are the prime driver of spacecraft structural design. Passive approaches for acoustic attenuation are limited in their low frequency effectiveness by constraints on total fairing mass and payload volume constraints. Active control offers an attractive approach for low frequency acoustic noise attenuation inside the payload fairing. Smart materials s...

Small satellite constellation of environment and disaster’s monitoring and predicting (shorted for HJ-1) is not a mapping satellite, and its parameters of attitude and orbit cannot satisfy the requirement of geometric correction using strict imaging model. On the other hand, due to the 12000 CCD detectors and large overlay of multispectral payload named CCD carried by HJ-1 satellite, the error ...

H S Manjunatha Reddy, K B Raja Abstract— Steganography is the method of hiding the secrete message in a cover object for covert communication. In this paper we propose Steganography based on Adaptive embedding of Encrypted Payload in Wavelet domain (SAEPW). The LWT2 (dB2) is applied on cover image and only XD band is considered for embedding. The XD band is further decomposed into three blocks ...

1 Launch loads, both mechanical and acoustic, are the prime driver of spacecraft structural design. Passive approaches for acoustic attenuation are limited in their low frequency effectiveness by constraints on total fairing mass and payload volume constraints. Active control offers an attractive approach for low frequency acoustic noise attenuation inside the payload fairing. Smart materials s...