"Right now, we have the commercial order of SPOT-6 from foreign customers, but there has been very serious enquiries for a few dedicated launches (heavy satellites to be launched by PSLV). These are at discussion level at the moment," he said on the sidelines of 40 years of ISRO's existence here.
Nair had said ISRO had not won a single international order in the last 30 months and the orders for SARAL and SPOT-6 satellites were won in 2008.
Nair also said the orders for launching SARAL, a French satellite, and SPOT-6, a satellite built by Astrium, the global majors, were won amid cut-throat competition during his tenure as the chairman of Antrix, ISRO's international marketing arm.
Talking to reporters, Radhakrishnan said the discussions would centre around "when they (foreign customers) want it and when ISRO would be ready to launch it." The Antrix is in the process of finalising this arrangement, he added.
On future launches, he said GSLV would undergo an acceptance test tomorrow at a special facility at the Liquid Propellant System Centre at Mahendragiri in Tamil Nadu.
"Thereafter the GSLV will undergo two more tests including an endurance test of 1,000 seconds at the same place."
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Radhakrishnan said ISRO was confident of using an indigenous cryogenic engine to propel its Geosynchronous Satellite Launch Vehicles (GSLV) by September this year.
ISRO would launch a low cost communication geo-stationary satellite GSAT-14 on board GSLV D5 this year. "GSAT-7 is scheduled for launch in few months time," he added. (MORE)