^ "Indian Standard Time: Lack of scientific temper". ^ "September 1, 1947: How Indian Standard Time was introduced in country". ^ "India investigates different time zones". 
^ "Military and Civilian Time Designations". Another increasingly popular means of obtaining the time is through Global Positioning System (GPS) receivers. Telephone companies have dedicated phone numbers connected to mirror time servers that also relay the precise time. To communicate the exact time to the people, the exact time is broadcast over the national All India Radio and Doordarshan television network. IST is taken as the standard time as it passes through almost the centre of India. Time and frequency calibrations made with the help of pico- and nanoseconds time interval frequency counters and phase recorders. Indian National Satellite System satellite-based standard time and frequency broadcast service, which offers IST correct to ☑0 microsecond and frequency calibration of up to ☑0 −10. 
High frequency broadcast service operating at 10 MHz under call sign ATA to synchronise the user clock within a millisecond. The signals are based on atomic clocks and are synchronised with the worldwide system of clocks that support the Coordinated Universal Time.įeatures of the Time and Frequency Standards Laboratory include: Official time signals are generated by the Time and Frequency Standards Laboratory at the National Physical Laboratory in New Delhi, for both commercial and official use. Proposals for creating an additional Eastern India Time (EIT at UTC+06:00), shifting default IST to UTC+05:00 and Daylight saving (Indian Daylight Time for IST and Eastern India Daylight Time for EIT) starting on 14 April (Ambedkar Jayanti) and ending on 2 October (Gandhi Jayanti) was submitted to DST for consideration. In June 2017, Department of Science and Technology (DST) indicated that they are once again studying feasibility of two time zones for India. However, the proposal would need to be cleared by the Union Government. In 2014, Chief Minister of Assam Tarun Gogoi started campaigning for another time zone for Assam and other northeastern states of India. Still Indian Standard Time remains the only officially used time. In Assam, tea gardens follow a separate time zone, known as the Chaibagaan or Bagan time ('Tea Garden Time'), which is one hour ahead of IST. Though the government has consistently refused to split the country into multiple time zones, provisions in labour laws such as the Plantations Labour Act, 1951 allow the Union and State governments to define and set the local time for a particular industrial area. The findings of the committee, which were presented to Parliament in 2004 by the Minister for Science and Technology, Kapil Sibal, did not recommend changes to the unified system, stating that "the prime meridian was chosen with reference to a central station, and that the expanse of the Indian State was not large." In 2001, the government established a four-member committee under the Ministry of Science and Technology to examine the need for multiple time zones and daylight saving. 
The binary system that they suggested involved a return to British-era time zones the recommendations were not adopted. In the late 1980s, a team of researchers proposed separating the country into two or three time zones to conserve energy. Inhabitants of the northeastern states have to advance their clocks with the early sunrise and avoid the extra consumption of energy after daylight hours. The country's east–west distance of more than 2,933 kilometres (1,822 mi) covers over 29 degrees of longitude, resulting in the sun rising and setting almost two hours earlier on India's eastern border than in the Rann of Kutch in the far west. Currently, the Council of Scientific and Industrial Research- National Physical Laboratory (CSIR-NPL) maintains the Indian Standard Time with the help of the Allahabad Observatory. The longitude of 82★'E passing through Naini near Allahabad was chosen as the standard meridian for the whole country, because there is a time lag of more than a hour between western India ( around +05:00) and northeastern India ( around +06:00), hence approximately standardizing with UTC+05:30 of central India. In 1905, the meridian passing east of Allahabad was declared as a standard time zone for British India and was declared as IST in 1947 for the dominion of India. Indian Standard Time is calculated from the clock tower in Mirzapur nearly exactly on the reference longitude of IST at 82☃0'E, within 4 angular minutes. Location of Mirzapur (near Allahabad) and the 82.5° E longitude that is used as the reference longitude for IST
0 kommentar(er)
