en.wikipedia.org/wiki/Chandrayaan-2#Vikram_lander

This claim is chronologically impossible.

• ISRO’s Chandrayaan-1 science page says the mission was launched successfully on October 22, 2008.
• NASA’s Chandrayaan-1 mission page also lists the launch date as Oct. 22, 2008.
• NASA further says that the mission’s landmark water result was published in September 2009, when scientists reported data from the M3 instrument showing hydroxyl- and/or water-bearing molecules on the Moon.

Because the spacecraft did not launch until late October 2008, it could not have detected water on the Moon in early 2008.

ISRO’s own reports treat this as a running total, not a yearly release rate.

• In ISRO’s Annual Report 2023–2024, Chandrayaan-2 had released about 20 TB of data so far.
• In ISRO’s Annual Report 2025–2026, the mission is described as having 48 TB of data released to over 10,000 users.

Those figures show cumulative growth over time (about 20 TB, then 48 TB), which contradicts the statement that the orbiter releases over 48 TB every year.

This wording overstates what ISRO reported.

• ISRO’s 2025–2026 annual report says scientists analyzed the radio occultation data from Chandrayaan-2 and the Mars Orbiter Mission. That describes combining data from two missions, not the two spacecraft making mutual measurements of one another’s radio signals.
• ISRO’s Chandrayaan-2 DFRS description explains that Chandrayaan-2 radio occultation uses signals transmitted from the Chandrayaan-2 orbiter and received at the ground station at Byalalu, Bangalore.
• ISRO’s Mars Orbiter Mission FAQ says MOM was a spacecraft orbiting Mars, having reached Mars orbit on 24 September 2014. Since MOM was at Mars while Chandrayaan-2 was at the Moon, the claim that they conducted radio-occultation measurements of each other’s signals is not supported by ISRO’s mission descriptions.

The underlying true statement appears to be that scientists used radio-occultation data from both missions in their analysis.