Amid pressure from the families of the passengers of Malaysia Airlines Flight 370 for more transparency about the search for the missing jet, Inmarsat, the global satellite communications company, said Tuesday that it would soon publish a full record of the communications received from the plane the day it disappeared. An analysis by Inmarsat of fleeting radio signals that were picked up on March 8 by one of its satellites played a central role in narrowing the search for the plane’s presumed crash site to the southern Indian Ocean. But after more than two months of searching, no trace of the plane or of the 239 people who were on board has been found. That has prompted calls from relatives and some outside experts for investigators to release the data on which Inmarsat based its findings, in the hope of identifying any errors or missed clues that could help locate the aircraft.