用具有Nasmyth或E-W支架的天线收集的VLBI数据的极化增益项的解
On the solution of the polarisation gain terms for VLBI data collected with antennas having Nasmyth or E-W mounts
摘要：
我报告的新代码的发展，以支持Nasmyth和E-W天线安装类型的AIPS，这将允许极化分析的意见，使用这些不常见的天线配置。这些安装类型可能会变得更广泛，因为它们有几个优点，特别是对于大地观测站。具有多个接收器的多波段观测只能安装在具有Nasmyth馈送的望远镜中。这些是IVS 2010中讨论的新一代大地测量阵列的要求。此外，下一代天线还需要具有非常高的转换速率，这些都可以通过E-W安装来实现。安装类型影响天空中不同点的左右圆偏振（LHC和RHC）之间的差分相位。该项目的目标天线是Yebes 40米望远镜，但由于该望远镜仍在建造中，用作演示的数据来自全球毫米波VLBI阵列（GMVA）的一部分Pico Veleta天线。对于E-W安装类型，有来自澳大利亚LBA阵列的合适数据。我证明了所做的更改的有效性，并可以应用Nasmyth和E-W校正。
英文摘要：
I report on the development of new code to support the Nasmyth and E-W antenna mount types in AIPS which will allow polarisation analysis of observations made using these uncommon antenna configurations. These mount types may become more widely spread as they have several advantages, particularly for geodetic observatories. Multi-band observations, with multiple receivers, can only be fitted into telescopes with Nasmyth feeds. These are the requirements for the new generation of geodetic arrays as discussed in IVS2010. Further more the next generation of antennae will also be required to have very high slew rates, and these can be achieved with the E-W mount. The mount type affects the differential phase between the left and the right hand circular polarisations (LHC and RHC) for different points on the sky. The target antennae for the project was the Yebes 40m telescope, but as that was still under construction the data used as a demonstration was from the Pico Veleta antenna as part of the Global Millimeter VLBI Array (GMVA). For the E-W mount type there are suitable data from the Australian LBA array. I demonstrate the effectiveness of the changes made and that the Nasmyth and E-W corrections can be applied.
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