Results 71 to 80 of about 67,391,839 (291)
ZY3-02 Laser Altimeter Footprint Geolocation Prediction
Sensors, 2017 Successfully launched on 30 May 2016, ZY3-02 is the first Chinese surveying and mapping satellite equipped with a lightweight laser altimeter. Calibration is necessary before the laser altimeter becomes operational. Laser footprint location prediction is
Junfeng Xie +8 more
doaj +1 more source
A METHOD FOR SELF-CALIBRATION IN SATELLITE WITH HIGH PRECISION OF SPACE LINEAR ARRAY CAMERA [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 At present, the on-orbit calibration of the geometric parameters of a space surveying camera is usually processed by data from a ground calibration field after capturing the images.
W. Liu, F. Qian, Y. Miao, R. Wang
doaj +1 more source
Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level
Aging and Cancer, EarlyView.This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley +1 more source
Precise Maneuver Calibration for Remote Sensing Satellites [PDF]
, 2006 Orbit maintenance maneuvers are performed as necessary to maintain the spacecrafts trajectory to within a specified tolerance relative to a set of predefined reference orbital parameters as depicted by the mission objectives. After each executed maneuver,
Kirschner, Michael +2 more
core
Rarefied gas effects on the aerodynamics of high area-to-mass ratio spacecraft in orbit [PDF]
, 2013 The aerodynamic situation of a satellite-on-a-chip operating in low Earth orbit bears some resemblance to a classical Crookes radiometer. The large area-to-mass ratio characteristic of a SpaceChip means that very small surface-dependent forces produce ...
White, Craig +4 more
core +3 more sources
Geometric Calibration of Parameters in the Perpendicular-Orbit Circular Scanning Satellite Camera
Remote SensingPerpendicular-orbit circular scanning satellites overcome the conflict between ground resolution and width observed in traditional optical satellites by using a perpendicular-orbit circular scanning imaging method and splicing along the orbit, achieving ...
Xufeng Zhang +3 more
doaj +1 more source
Long-term cross calibration of HJ-1A CCD1 and Terra MODIS reflective solar bands
Scientific Reports, 2021 Since its launch on September 6, 2008, HJ-1A has been in the orbit for 13 years. The CCD1 sensor on the HJ-1A has four reflected solar bands. Since the calibration frequency is limited to the annual site calibration, cross-calibration is an effective ...
Li Liu +5 more
doaj +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objectives Acute kidney injury (AKI) is a common but often underrecognized complication in ischemic stroke patients undergoing mechanical thrombectomy, particularly among those with pre‐existing renal impairment. This study evaluated the incidence, risk factors, and clinical impact of AKI in this high‐risk population.
Michał Borończyk +10 more
wiley +1 more source
In-orbit optical calibration for acquisition and tracking on OSIRIS4CubeSat
OSIRIS4CubeSat, the smallest commercially available laser communication terminal, within the confines of 0.3-units inside of a three-unit CubeSat, was launched into space as PIXL-1 mission to demonstrate optical direct to earth links. This work primarily
Rein, Fabian +4 more
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Robotic On-Orbit Servicing - DLR's Experience and Perspective. [PDF]
, 2006 The increasing number of launched satellites per year, calls for solutions to keep free operational space for telecommunication systems in geo-synchronized orbit, as well as to avoid the endangering of space systems in LEO (Low-Earth Orbit) and of the ...
Landzettel, Klaus +11 more
core +1 more source