Bangalore: The ISRO row has intensified with its former chief G Madhavan Nair writing to the PMO to order an enquiry into the reasons behind the annulment of the controversial Antrix-Devas deal and the procedure followed, in a fresh salvo at his successor K Radhakrishnan.

READ MORE:Antrix-Devas deal: Nair demands probe

"I have addressed a detailed letter," Nair said here.

"They have made certain charges that I have put a least penalty clause (in the contract) defence requirements were not met etc. These points ... point by point I have explained to them".

He said he addressed the letter to the Minister in the Prime Minister's Office, V Narayanasamy, mainly because he has been making statements based on official inputs. "So I thought he (Narayanasamy) should know there is something beyond official reports. That's the whole purpose (of writing letter to him).

The two-member committee of B K Chaturvedi and Roddam Narasimha reviewed the technical, commercial, procedural and financial aspects of the Antrix-Devas agreement and their report said concerns of cheap selling of spectrum to Devas have no basis whatsoever.

But a five-member high-level team, chaired by Pratyush Sinha, which examined the deal and identified acts of omission and commission by government officials, found "... not only serious administrative and procedural lapses but also suggestion of collusive behaviour on the part of certain individuals."

The Sinha-panel concluded that the four former ISRO scientists, including Nair, were responsible for various acts of commissions.

Last month, on the basis on these two reports, Nair and the other three scientists were black-listed from holding any government assignments.

Nair at the time charged ISRO chairman Radhakrishnan, who is also Space Commission Chairman and Secretary in the Department of Space, with "witch-hunting" and "vendetta" and of misleading the government on the deal.

Earlier in his letter to PMO, Nair had protested the action taken against him and fellow scientists.

The PMO action had come in for flak from the scientific community, which included well-known scientist Prof C N R Rao and others.

Recently, another distinguished space scientist, Prof Roddam Narasimha, too expressed displeasure over the action initiated against Nair and quit as Space Commission Member.

Narasimha on Sunday said he was yet to decide on the PMO's request for reconsidering decision to quit the Space Commission, with which he had been associated for about 20 years.

Blaming the Space Department for not disclosing B N Suresh Committee's recommendations, Nair said the panel had not recommended cancellation of the Devas agreement, but it needed to be re-negotiated in the backdrop of societal and security needs.

Radhakrishnan had appointed the committee to review the agreement soon after assuming charge in November 2009.

Nair said the committee had also concluded that the same procedures of leasing transponder capacity were followed while finalising the agreement, as done in other agreements.

He alleged that the committee's findings were not properly presented before the Space Commission meeting in 2010. The committee had submitted its report in June 2010.

He said the Insat Coordination Committee was not consulted and as per Satcom Policy, ICC had authorised Space Department to lease out transponder capacity to private users. The Union Cabinet was also not consulted, he said.

Nair said the notes before Space Commission and the Cabinet to seek approval for the satellites to carry transponders meant for Devas were on similar lines as in any other proposal for funding new communication satellites.

"It was never the practice to mention the name of specific private users in such proposals. You can see that the information provided to the Space Commission was not accurate. Does this not amount to misleading the Space Commission?"

He also questioned the over six-month delay in conveying the commission's recommendation to cancel the agreement to the Cabinet for final decision.

"I can go on citing many such examples in which the DoS has failed to take timely action and conduct internal reviews in a transparent manner involving the concerned specialists and discuss it with peers who were knowledgeable in this deal," he said.