A cryogenic stage full-duration test is expected to confirm India's position as the sixth country to possess a highly complex technology. Other countries that already have it are the United States, Russia, Europe, Japan and China.

The firing is called a full-duration test because the Indian Space Research Organisation's (ISRO) Geo-synchronous satellite launch vehicle (GSLV) with a cryogenic stage will also fire for 720 seconds in actual flight before injecting a satellite weighing more than 2,500 kg into an orbit of 36,000 km by 180km.

If the test is successful, a GSLV with India's own cryogenic stage will lift off from Sriharikota this year itself. It will make the country totally self-reliant in every department of rocket technology.

A cryogenic engine uses liquid hydrogen at -265 degrees Celsius as fuel and liquid oxygen at -240 degrees Celsius as oxidiser. Development of the engine involves a highly complex technology because of the very low temperatures of the propellant.

ISRO's chairman, G Madhavan Nair said: $quot;The cryogenic technology is highly complex and exotic.$quot;

Test Postponed
The long duration hot test of indigenous cryogenic stage for the full flight duration was planned for 19th January 2007.

As announced by the Hindu news service, The Indian Space agency did not carry out the much awaited full duration test of the indigenous cryogenic rocket system. Preparations for the test of the cryogenic rocket engine were completed satisfactorily however due to certain anomalies the test was not carried out on 19th January.

ISRO's chairman, G Madhavan Nair said: $quot;We have not proceeded with the test. We noticed some anomaly...deviation electronically and we will reschedule the test in a couple of weeks.$quot;