Solar wind particle experiment payload onboard Aditya-L1 starts operations: ISRO
Bengaluru (PTI): The Aditya Solar wind Particle Experiment payload onboard India's Aditya-L1 satellite has commenced its operations and is performing normally, ISRO said on Saturday.
ISRO's Polar Satellite Launch Vehicle (PSLV-C57) on September 2 had successfully launched the Aditya-L1 spacecraft, from the second launch pad of Satish Dhawan Space Centre, Sriharikota.
Aditya-L1 is the first Indian space-based observatory to study the Sun from a halo orbit around first Sun-earth Lagrangian point (L1), which is located
roughly 1.5 million km from Earth.
In a statement, ISRO said Aditya Solar wind Particle Experiment (ASPEX) comprises two cutting-edge instruments 'the Solar Wind Ion Spectrometer (SWIS) and SupraThermal and Energetic Particle Spectrometer (STEPS). The STEPS instrument was operational on September 10, 2023. The SWIS instrument was activated on November 2, 2023, and has exhibited optimal performance.
"SWIS, utilising two sensor units with a remarkable 360 field of view each, operates in planes perpendicular to one another," the statement read.
According to ISRO, the instrument has successfully measured solar wind ions, primarily protons and alpha particles.
A sample energy histogram acquired from one of the sensors over two days in November 2023 illustrates variations in proton and alpha particle (doubly ionized helium, He2+) counts, the agency said.
"These variations were recorded with nominal integration time, providing a comprehensive snapshot of solar wind behaviour," ISRO said.
The directional capabilities of SWIS enable precise measurements of solar wind protons and alphas, contributing significantly to addressing longstanding questions about solar wind properties, underlying processes, and their impact on Earth, the space agency explained.
"The change in the proton and alpha particle number ratio, as observed by SWIS, holds the potential to provide indirect information about the arrival of Coronal Mass Ejections (CMEs) at the Sun-Earth Lagrange Point L1," ISRO said.
Enhanced alpha-to-proton ratio is often regarded as one of the sensitive markers of the passage of interplanetary coronal mass ejections (ICMEs) at the L1 and hence considered crucial for space weather studies.
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UP: Over 100 monkeys die of toxic chemical, buried in pit to hide carnage
Hathras (UP), Nov 22: More than 100 monkeys perished after inhaling a pesticide sprayed in a food godown and were stealthily buried in a pit, police on Friday said.
The bodies were taken out for a postmortem by a team of veterinarians on Friday.
Circle Officer Yogendra Krishna Narayan said police came to know about the deaths on Wednesday.
Police have registered a case against the employees of Food Corporation of India and started an investigation.
According to police, the chemical in question was aluminium phosphide sprayed on wheat sacks to protect it from insects and rodents in an FCI warehouse on November 7.
A troop of monkeys entered the warehouse through a broken window of the godown on the night of November 7 and ended up inhaling the gas.
When the workers opened the warehouse on November 9, they saw several monkeys dead.
They allegedly chose not to inform their seniors about deaths and buried the bodies in a pit.
The CO said the bodies were exhumed when some Vishv Hindu Parishad leaders came to know about the incident.
As per police count, more than 100 monkeys were exhumed from the pit.
Their bodies were in late stage decay, the officer said.
