Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

精密的电离层和对流层模型到底能不能加速PPP收敛? #30

Open
XiaoGongWei opened this issue May 19, 2020 · 0 comments
Open

Comments

@XiaoGongWei
Copy link
Owner

问题:精密的电离层和对流层模型到底能不能加速PPP收敛?

理解:

  1. PPP收敛过程属于PPP前期,PPP前期影响收敛误差主要来源于伪距(3m误差),当前对流层估计模型误差在0.1-0.3m左右的常偏差(2小时)。对流层误差相对于伪距误差较小,对收敛影响不大。当然把对流层改正到cm或者mm级别有助于PPP收敛(快2分钟,乃至5分钟),这种提高并不会有很大的应用意义。能够提高10min以上才能有较大的意义。

  2. 前期伪距精度的提高才是关键。假如伪距是cm或者mm级别,那么PPP收俩就会很快了。或者知道精度较高的参数也可以极大加快收敛速度。

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant