|levtype:||ml, pl, pt, pv, sfc|
|type:||an, cl, fc|
|stream:||mdfa, mnth, moda, msda, msdc, oper, supd, wave|
|class:||e2, e4, ei, em, ep, er, mc, od, yt|
MARS request efficiency
Data at this level are stored in one file on tape and are best retrieved with a single MARS request and not iterated through. For more information, please refer to our guidelines to write efficient MARS requests.