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Spacecraft when placed in plasma, spacecraft charging occurs which results in ESD discharge. This paper focuses on ESD fields radiated in spacecraft level and the noise coupled to a nearby wire when it is exposed to these radiated fields. A dipole model is considered to predict the transient radiated fields. The ESD current data is experimentally obtained in order to obtain the noise coupled to nearby...
Conducted and radiated mode EMI/EMC tests are carried out at subsystem level to establish Electromagnetic compatibility in spacecraft. EMI/EMC test requirements of ISRO spacecraft subsystems are derived from MIL-STD 461C and the procedure given in MIL-STD 462. Low frequency conducted susceptibility test (CS01) is automated to perform the test accurately from 30Hz to 50kHz. The power line impedance...
This paper deals with the modeling and estimation of differential mode conducted emissions from a DC/DC Converter (buck converter) which operates at 295 kHz. Typical Buck converter is modeled as ac equivalent circuit and simulations are carried out. Fixed resistive load impedance is considered for the simulation and conducted emissions are simulated in frequency range of 10 kHz to 1MHz. Practical...
The MARS Orbiter Mission (MOM) spacecraft carries on-board sensitive receiver and high gain antenna system to cater to the requirement of inter-planetary and deep space communication. This paper describes, among others, the stringent EMC requirements for MOM spacecraft, summary of EMC analysis carried out, modification on subsystem level EMI/EMC test limit and EMI/ESD mitigation techniques followed...
SummaryThe results of DREZlesioning procedure used for the treatment of chronic intractable pain due to deafferentation caused by gunshot injuries at the thoracolumbar (T10-L1) spine level are reported in six patients The specificity of these cases arises from the fact that all the patients underwent, after decompressive laminectomy, an implantation of vascularized omental graft on the injured cord...
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