rename.ts

const skywatchRE = /SKYWATCH_(PL_PS|S2_MS)_(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})/;

const entries = [];

for await (const dirEntry of Deno.readDir(".")) {
  const match = dirEntry.name.match(skywatchRE);
  if (match) {
    const sat = match[1];
    const date = `${match[2]}-${match[3]}-${match[4]}T${match[5]}-${match[6]}`;
    const renamed = `${date}_SKYWATCH_${sat}.tif`;
    entries.push(renamed);
    Deno.rename(dirEntry.name, renamed);
  }
}

console.log(entries.sort());