In October 1999, the system began "friendly user" trials with 44 of 48 planned satellites.

As a result Indian security forces are set to conduct user trials.

The prototypes are currently under the user trials as on 2012.

The final user trials were held during July 2010 and successfully completed.

A new, improved iPlayer service then had another very limited user trial which began on 15 November 2006.

The prototypes are currently under the user trials.

As of March 2013 the prototypes are currently under the user trials.

"But the truth is that we really won't know until we have extensive user trials."

It will now enter production phase, subject to user trials and acceptance by the Indian Army.

Development and trials will continue and the rocket is expected to enter user trial by 2012.