|levtype:||ml, pl, sfc|
|month:||jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec|
|year:||1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996|
|type:||4i, 4v, ab, af, ai, an, ea, ef, fb, fc, fg, gai, go, ia, im, me, mfb, ob, ofb, oi, oldim, sim, ssd, tf|
|stream:||efho, efhs, efov, enfh, enfo, enwh, esmm, ewhc, ewho, mfam, mfhm, mfwm, mhwm, mmsa, mmsf, mnfc, mnfh, mnth, mofc, mofm, msmm, oper, scda, scwv, seas, sfmm, smma, waef, wamf, wave, wehs, weov, wmfm|
|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.