[PPTD-TM1A] Sorry for the wait! Here’s an animation of the target marker separation. This was taken today (May 30) by the ONC-W1 from 11:19 - 11:23 JST (onboard time) at an altitude between 10m - 40m. We were able to drop in the CO1 area as planned ( JAXA, Chiba Inst. of Tech).
The target marker separation on May 30 during PPTD-TM1A was caught at the last moment by the small monitor camera, CAM-H! The image time was May 30, 11:18 JST (on-board time) at an altitude of about 9m. CAM-H was built with donations from all of you & is a big success! Thank you!
Еще про маркер
"...поскольку поверхность Рюгу каменистая, космическое агентство проведет детальное исследование, чтобы определить, является ли это точкой, где зонд может приземлиться снова, не задев ни одного камня.
Hayabusa2 выпустил свой первый маркер цели в октябре прошлого года, приземлившись на расстоянии 15,4 метра от места, к которому стремилась команда зонда. Используя этот маркер цели в качестве контрольной точки, зонд совершил посадку на отдельном, меньшем пространстве на астероиде в феврале..."
The low descent observation operation (PPTD-TM1B) will be conducted between June 11 - 13. As we successfully dropped a target marker in area CO1 during the PPTD-TM1A operation that was performed between May 28 – 30, a target marker will not be dropped during PPTD-TM1B, but observations will be taken near the artificial crater.
Preparations for the descent began on June 11 and the descent will begin on June 12 at 11:40 JST (on-board time) with the spacecraft descending at a speed of 0.4m/s. The speed will be reduced to 0.1 m/s at 22:00 JST on the same day. The spacecraft will read an altitude of about 35m on June 13 at 10:34 JST and then begin to ascend from 10:57 JST. The schedule of the operation is shown in Figure 1. Please be aware that the actual operation time may differ as the times shown are the planned values.
[Open in a separate window] Figure 1: Schematic of the PPTD-TM1B operation (credit: JAXA).
Note: times listed may differ from the actual operation.
Figure 2 shows the operation sequence at low altitude.
[PPTD-TM1B] June 12 at 10:00 JST: Shift 1 of PPTD-TM1B --a low altitude observation operation-- has begun. Decent preparations began yesterday and the spacecraft will begin its descent today. This operation will not drop a target marker, but observe near the artificial crater.
[PPTD-TM1B] June 12 at 14:54 JST: The spacecraft altitude is about 15km. Today's operation has been performed with fewer people than for the previous descent operation. Work is underway in a very calm atmosphere.
[PPTD-TM1B] June 12 at 10:28pm JST: Gate 2 check. It was confirmed that the descent speed of the spacecraft has decelerated to about 10 cm/s and both the spacecraft and ground system are normal. The spacecraft descent will continue.
[PPTD-TM1B] June 13 at 11:41 JST. The spacecraft has reached escape acceleration from Ryugu and Hayabusa2 is returning to the home position. This concludes the operation and Project Manager Tsuda has declared it a success! This was met by applause in the control room.
[PPTD-TM1B] June 13 at 11:54 JST: Gate 5 check. The spacecraft and ground system were confirmed to be both still normal. The minimum altitude for this operation (preliminary figure) is 9m (at 11:06 JST ground time).
On June 13 --"Hayabusa Day"-- the PPTD-TM1B operation for Hayabusa2 was completed safely. It has not yet been decided if the second touchdown (PPTD) will be performed, but all the important operations prior to PPTD are finished and we will continue to consider the operation.