altocumulus lenticularis

altocumulus lenticularis lenticular clouds latin lentil shaped lenticula form mostly troposphere perpendicular alignment wind appearance lens nacreous stratosphere sometimes shapes types stratocumulus cirrocumulus ccsl varying altitude above ground their unique been suggested explanation some unidentified flying object ufo sightings from are stationary typically direction often comparable saucer lower three main standing acsl scsl because for photo drone dji mavic