The Sol 1542 drill diagnostics did not complete as intended, and as a consequence, neither did some of the later science activities.  Therefore, those tests and activities from Sol 1542 will be planned again on Sol 1543.  But first, ChemCam will shoot its laser at a target near Hunters Beach, called "Bracy Cove," and at the bright layers just above The Anvil.  Late in the afternoon, ChemCam will perform a routine observation of its titanium calibration target, the Left Mastcam will acquire a 5x1 mosaic of "Squid Cove," and the Rear Hazcam will take another image to look for changes due to winds.  Overnight, SAM will perform an Opportunistic Derivitization experiment on a sample from Cumberland that we’ve been carrying since early in the landed mission.  This experiment has been some time in the making and should improve SAM's ability to characterize the organic molecules within that sample.  Early in the morning of Sol 1544, Navcam will search for clouds and dust devils, Mastcam will measure dust in the atmosphere, and both cameras will re-attempt the photometry observations that were planned yesterday.