FITS Checksum提案
FITS Checksum Proposal
摘要：
这里描述的校验和关键字对FITS HDU中包含的信息进行完整性检查。（标题和数据单元是FITS文件的基本组成部分，由标题关键字记录和可选的相关数据记录组成）。HDU关键字的值可以强制HDU中所有2880字节FITS逻辑记录上累积的32位1的补码校验和等于负0。(Note 1的补码运算具有正零元素和负零元素）。如果累积的校验和仍然等于-0，则提供了一种快速且相当可靠的方式来确定HDU在将文件复制或存储在物理介质上时没有被后续数据处理操作修改或损坏。
英文摘要：
The checksum keywords described here provide an integrity check on the information contained in FITS HDUs. (Header and Data Units are the basic components of FITS files, consisting of header keyword records followed by optional associated data records). The CHECKSUM keyword is defined to have a value that forces the 32-bit 1's complement checksum accumulated over all the 2880-byte FITS logical records in the HDU to equal negative 0. (Note that 1's complement arithmetic has both positive and negative zero elements). Verifying that the accumulated checksum is still equal to -0 provides a fast and fairly reliable way to determine that the HDU has not been modified by subsequent data processing operations or corrupted while copying or storing the file on physical media.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
