航天器的热保护系统（TPS）可确保航天器表面的结构完整性，并在航天器返回时承受严重的热负荷时保持正确的内部温度（对于乘员、电子设备等）。这些载荷的特点是在相对较短的再入期内有非常大的热通量。购买本文件时可获得的所有当前修订均包含在购买本文件中。

The thermal protection system (TPS) of a space vehicle ensures the structural integrity of the surface of the craft and maintains the correct internal temperatures (for crew, electronic equipment, etc.) when the vehicle is under the severe thermal loads of re-entry. These loads are characterised by very large heat fluxes over the relatively short period of re-entry.All current amendments available at time of purchase are included with the purchase of this document.