BENGALURU: The Indian Space Research Organisation (Isro) may announce its decision on the next launch date for Chandrayaan-2 on Wednesday, after it “implements corrective action”, sources privy to the developments, said.

“If all goes well, we may probably see the launch happen as early as next Monday (July 22),” said a source. However, Isro is yet to officially make a statement.

Monday’s aborted bid was among the last of a series of launch windows Chandrayaan-2 mission missed since last year.

Every launch has an optimal window to achieve the desired results. While Monday (July 15) had the longest window of 10 minutes — between 2.51am and 3.01am — Isro will have a window of one minute a day for the rest of the month.

The present window closes by this month-end, and if Isro misses it, Chandrayaan-2 may have to wait at least till September. Some scientists said it may not happen this year.

A source from Isro Telemetry, Tracking and Command Network (Istrac), said: “The satellite side has done an analysis. According to this, if we miss the July 31 window, there will be an impact on the mission profile.”

The source, while stating that mission planning, will need re-worked if the present window is missed, and there are estimations that a new plan may need more fuel.

“This will affect operations of payloads. If we miss the deadline, the orbiter’s life may be reduced to six months from the present one year, as it would have used up some of its fuel,” the source said.

Also, in an indication of Isro's urgency to launch in the July window, a fresh NOTAM (notice to airmen) — an alert issued ahead of every launch — has been issued Monday evening.

The alert is effective on July 17 between 2.30am and 3.30am, and for July 18 to 31 between 2pm and 3.30pm.

