Sun outage: Difference between revisions
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=====BSE Market timings during Sun Outage ===== |
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!width="25%"|Event |
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!width="20%"|Duration |
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| MARKET OPEN |
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| 09:55 AM to 11:45 AM |
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| BREAK |
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| 11:45 AM to 12:30 PM |
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| MARKET RESUME |
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| 12:30 PM to 04:15 PM |
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| CLOSING SESSION |
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| 04:25 PM to 04:45 PM |
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==See also== |
==See also== |
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Revision as of 08:08, 7 March 2008
A sun outage is an interruption in or distortion of geostationary satellite signals caused by interference from solar radiation. The effect is due to the sun's radiation overwhelming the satellite signal. Generally, sun outages occur in February, March, September and October, that is, around the time of the equinoxes. At these times, the apparent path of the sun across the sky takes it directly behind the line of sight between an earth station and a satellite. As the sun radiates strongly at the microwave frequencies used to communicate with satellites (C-band and Ku-band) the sun swamps the signal from the satellite. The effects of a sun outage can include partial degradation, that is, an increase in the error rate, or total destruction of the signal.
Effect on Indian Stock Exchanges
In India, the BSE (Bombay Stock Exchange) and NSE (National Stock Exchange) use VSATs (Very Small Aperture Terminal) for members to connect to their trading systems. VSATs depend upon satellites for connectivity between the terminals/systems. Hence these exchanges are affected due to the sun outage. These exchanges normally remain closed from 11:45 to 12:30 during 'sun outages', but times vary depending on the scientific factors. The interference in satellite signals disturbs smooth transmission of data of online transactions, hence these share markets remain closed for the duration of sun outages. Due to these outages, the trading sessions are normally extended in the same day to compensate for the lost time. In September 2006, however, only the NSE intended to shut down during the sun outage; the BSE did not. The reason for which is unknown.
NSE shall remain closed between 11:25 to 12:05 Hours as per Circular No.: NSE/CMO/044/2007
Download No. NSE/CMTR/9448 from NSE
There will be a change in the NSE and BSE market timings from September 25, 2007 to October 09, 2007 due to the sun outage. The changed timings will be as follows;
(March 04, 2008 to March 18, 2008)
NSE Market timings during Sun Outage
| Event | Duration |
|---|---|
| MARKET OPEN | 09:55 AM to 11:25 AM |
| BREAK | 11:25 AM to 12:10 PM |
| MARKET RESUME | 12:10 PM to 04:15 PM |
| CLOSING SESSION | 04:35 PM to 04:45 PM |
BSE Market timings during Sun Outage
| Event | Duration |
|---|---|
| MARKET OPEN | 09:55 AM to 11:25 AM |
| BREAK | 11:45 AM to 12:30 PM |
| MARKET RESUME | 12:30 PM to 04:15 PM |
| CLOSING SESSION | 04:15 PM to 04:45 PM |
(March 4, 2008 to March 18, 2008)
NSE Market timings during Sun Outage
| Event | Duration |
|---|---|
| MARKET OPEN | 09:55 AM to 11:45 AM |
| BREAK | 11:45 AM to 12:30 PM |
| MARKET RESUME | 12:30 PM to 04:15 PM |
| CLOSING SESSION | 04:35 PM to 04:45 PM |
See also
External links
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