Disclosed is a single-piece container adapted to receive and secure an insert card. In order to enable a re-acquisition of the system time based on a noisy received signal, it is proposed that the method comprises as a first step reconstructing a beacon signal for an interval based on available information. Suitable materials for the PTP compensation layer include zirconium oxide ceramics characterized by negative coefficients of thermal expansion such as ZrMo2O8. Another index includes a document index, which organizes a set of documents that are searchable.