What was the launch date for the sattelite with ado that was 4 kg and 3 meters in diameter?
CREATE TABLE "table1_2150068_1" (
  "satellite" text,
  "launch_date_utc" text,
  "decay" text,
  "mass_kg" text,
  "diameter_m" text,
  "nssdc_id" text,
  "nation" text,
  "usage" text
);
SELECT "launch_date_utc" FROM "table1_2150068_1" WHERE "usage"='ado' AND "mass_kg"='4' AND "diameter_m"='3';