1.4 Additional Information CMS is committed to maintaining the integrity and security of health care data in accordance with applicable laws and regulations. Disclosure of Medicare Beneficiary eligibility data is restricted under the provisions of the Privacy Act of 1974 and HIPAA.
horizon-the line at which the sky and Earth appear to meet. apparent horizon, sensible horizon, visible horizon, skyline. linear perspective, perspective-the appearance of things relative to one another as determined by their distance from the viewer.
Cirrus: They are the highest of all clouds and they are composed purely of ice crystals. They occur, specifically, at an altitude of  16,500 to 45,000 feet and they can be found all over the world. Although they are known to form precipitation, none of it reaches the ground.