Mathematical Problems in Engineering / 2017 / Article / Fig 4

Research Article

Ballistic Coefficient Estimation for Reentry Prediction of Rocket Bodies in Eccentric Orbits Based on TLE Data

Figure 4

Reentry predictions 30 days before reentry using an older or newer TLE for BC estimation and the same or a different state for BC estimation and reentry prediction. All reentry predictions start from the TLE at 30 days before reentry. BC estimation starts from the same TLE (orange and blue lines) or ends there and starts at a different TLE (yellow and green lines). The other TLE used of BC estimation is either an older or a newer TLE with respect to the TLE at 30 days. (The colors of the plots in (a) and the arrows in (b) correspond.)
(a) Cumulative distributions and 90%-confidence regions of reentry prediction errors using only an estimate for BC for 91 objects 30 days before reentry
(b) Schematic diagram of BC estimation

We are committed to sharing findings related to COVID-19 as quickly and safely as possible. Any author submitting a COVID-19 paper should notify us at help@hindawi.com to ensure their research is fast-tracked and made available on a preprint server as soon as possible. We will be providing unlimited waivers of publication charges for accepted articles related to COVID-19. Sign up here as a reviewer to help fast-track new submissions.