Communication Current Affairs - 2020
The Ministry of Information and Broadcasting has issued draft guidelines for satellite TV channels.
The Ministry has listed 11 violation under the guidelines. It includes delay in intimating the ministry about the change in shareholding pattern of the company, appointing a director without the permission of the ministry, not removing a director who has been denied with security clearance, showing logo that is not permitted by the ministry, etc.
If any of the 11 clauses are violated the ministry would warn, impose penalty or even prohibit broadcast up to 10 days.
According to the guidelines, the channels need not get clearance ever year. Also, the permits will be provided to the Indian teleports for up linking foreign channels to increase their business. For now, the channels registered under ‘news’ category are allowed to make live telecasts. The rest of the channels have to get permission from the ministry to telecast live events. However, under the guidelines, these non-news channels are allowed to live telecast after registering themselves under “Broadcast seva”.
Since 1997, the giving preference to Indian satellite was always an integral part of the policies of GoI. However, this time the guidelines say that the only criteria to use a satellite channel is that it should be uplinked on C band or Ku band.
C band and Ku band
The Ku band uses frequencies between 12 GHz and 19 GHz. The C band uses radio frequency between 4 GHz and 8 GHz.
Tags: Communication • Communication Satellite • e-TV • Guidelines • Information and Broadcating
The Indian Institute of Geomagnetism researchers have developed a model that will predict electronic density of ionosphere. This is highly important for the communication and navigation on the earth.
The researchers developed an Artificial Neural Networks based Global Ionospheric Model (ANNIM) to predict ionospheric electron density. The model was developed by using data collected for more than 20 years.
Artificial Neural Network
The ANNs mimic the process of human brain. They help in clustering, recognition, generalization, classification and non linear data fitting. It captures morphological features of ionosphere. This is highly helpful to study changes in the ionosphere due to disturbed weather periods that has been on the rise lately. It also helps to learn about geomagnetic storms that occur due to the magnetic clouds that originate from the sun.
The Magnetic storms are rapid change in huge magnetic fields. They can last from hours to days. A magnetic storm on the earth’s magnetosphere is caused by solar winds.