行星星历计划：能力，比较和开源可用性
The Planetary Ephemeris Program: Capability, Comparison, and Open Source Availability
摘要：
我们在科学文献中首次描述了行星星历程序（PEP），一个开源的通用天体测量数据分析程序。我们讨论，特别是脉冲星时序分析，这是最近在PEP升级，以处理更多的选项的实施。这个实现是独立于其他脉冲星程序完成的，只有我们讨论的一些小例外。我们通过比较PEP和Tempo 2对到达时间观测的分析的拟合后残差来说明这种能力的实现。比较显示出实质性的一致性：在2002年12月至2011年2月的时间间隔内，对双星系统PSR J1909-3744中的毫秒脉冲星（脉冲周期为2.947108 ms;脉冲的半高全宽为43 $μ$ s）进行的1,065个脉冲到达时间测量的均方根差为22 ns。
英文摘要：
We describe for the first time in the 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 post-fit residuals from the analyses of time-of-arrival observations by both PEP and Tempo2. The comparison shows substantial agreement: 22 ns rms differences for 1,065 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 $μ$s) for epochs in the interval from December 2002 to February 2011.
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