We describe for the first time in scientific literature the Planetary Ephemeris Program (PEP), an open-source general-purpose astrometric data-analysis program. We discuss, in particular, the implementation of pulsar timing analysis, which was recently upgraded in PEP to handle more options. This implementation was done independently of other pulsar programs, with minor exceptions that we discuss. We illustrate the implementation of this capability by comparing the postfit residuals from the analyses of time-of-arrival observations by both PEP and Tempo2. The comparison shows substantial agreement: 22 ns rms differences for 1065 pulse time-of-arrival measurements for the millisecond pulsar in a binary system, PSR J1909-3744 (pulse period 2.947108 ms; full width half maximum of pulse 43 μs), for epochs in the interval from 2002 December to 2011 February.

我们首次在科学文献中描述了行星星历计划 (PEP)，这是一个开源的通用天体测量数据分析程序。我们特别讨论了脉冲星定时分析的实现，它最近在 PEP 中升级以处理更多选项。这个实现是独立于其他脉冲星程序完成的，除了我们讨论的小例外。我们通过比较 PEP 和 T empo 2 的到达时间观测分析的后拟合残差来说明此功能的实现。比较显示基本一致：1065 脉冲到达时间测量的 22 ns rms 差异双星系统中的毫秒脉冲星，PSR J1909-3744（脉冲周期 2.947108 ms；脉冲的半高全宽 43 μs)，对于从 2002 年 12 月到 2011 年 2 月的时间间隔内的历元。