SPICE kernel file contents are summarized below. S- Spacecraft ephemeris, given as a function of time. The P kernel also logically includes certain physical, dynamical and cartographic constants for target bodies, such as size and shape specifications, and orientation of the spin axis and prime meridian.
Chronic muscle strains are the result of repetitive movement. This can be due to: 1  sports like rowing, tennis, golf, or baseball. 2  holding your back or neck in an awkward position for long periods of time, such as when you work at a desk.ou can decrease your chances of straining a muscle if you take some basic precautions. 1  Try not to sit in one position for too long. 2  Take frequent breaks to move and change position. 3  Use a chair that provides good support for your lower back or use a pillow for support. 4  Try to keep your knees level with your hips.
What Causes Musculoskeletal Pain? The causes of musculoskeletal pain are varied. Muscle tissue can be damaged with the wear and tear of daily activities. Trauma to an area (jerking movements, auto accidents, falls, fractures, sprains, dislocations, and direct blows to the muscle) also can cause musculoskeletal pain.