Many times, users will want to form a full SEED volume from the SOD data. In forming a full SEED volume from miniSEED, the data records must be knit together with header information. To supply this, the user must obtain a dataless SEED volume from the IRIS DMC for the network in question. A dataless SEED volume is a SEED volume containing only header information. The DMC maintains dataless SEEDs covering all of the stations for each network supported.
Some networks have multiple dataless SEEDs listed, each with a date tag.
It is usually best to get the most recent one. Now armed with a miniSEED volume, dataless SEED volume, and the latest version of rdseed , a full SEED volume can be formed. The stipulation currently is that the SEED volume formed can be only for one network, since any one dataless SEED supplied by the DMC applies to only one network. This will tell rdseed that the response information for the data provided by the miniSEED can be found in the file specified. The user types 'rdseed' on the command line to start up the program and then answers a series of questions to select the nature of processing desired.