Author Topic: LIVE: Tianzhou-1 - CZ-7 (Y2) - WSLC, LC201 - April 20, 2017 (11:41 UTC)  (Read 50897 times)

Offline northenarc

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times

Are those really times?  The 7837 looks more like a range or something - can someone translate?
I think the times for launch events are those attached here:
Ok, I admit I was guessing  ???

Offline Star One

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Congratulations to all concerned in the launch of China's first automated cargo vessel.
« Last Edit: 04/20/2017 12:43 PM by Star One »

Offline SmallKing

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times

Are those really times?  The 7837 looks more like a range or something - can someone translate?
I think the times for launch events are those attached here:

Time
Longitude
Latitude
Altitude
Speed

White number are scheduled number and greens are the actual one.

Thanks, that makes much more sense.
And the times posted above (173.0 to 601.2) are presumably: Strapons sep, Stage 1 MECO,
Stage 1 sep, Fairing sep, Stage 2 MECO, Stage 2 VECO, Stage 2 sep.
The forth is interstage separation
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Online Galactic Penguin SST

The mass of TZ-1 was confirmed in the official broadcast as 12.91 tonnes.
« Last Edit: 04/20/2017 12:49 PM by Galactic Penguin SST »
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline IanO

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Congratulations to China for the second use of their next generation rocket!

This makes two launches to different space stations within one day!  Is this a milestone in spaceflight?
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Offline Infinitesky

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times

Are those really times?  The 7837 looks more like a range or something - can someone translate?
I think the times for launch events are those attached here:
7837 is speed m/s

Online FutureSpaceTourist

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Eric Berger's write-up:

https://arstechnica.com/science/2017/04/china-takes-a-key-step-toward-building-a-large-space-station/

Many congratulations to China. Fantastic to see continuing development of space capabilities in multiple countries. Long may it continue.

Online Lar

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Congratulations to the PRC and their organizations for their achievement, first automated cargo ship and a use of CZ-7... How nifty that we had two cargo launches on two consecutive days.

Thanks as always to all NSFers who helped with coverage...
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Online Galactic Penguin SST

1st docking to TG-2 will be on April 22 at around 04:00 UTC, i.e. about 6 hours before Cygnus does.

Source
« Last Edit: 04/20/2017 04:15 PM by Galactic Penguin SST »
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Online Galactic Penguin SST

Photos via Xinhua:
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline ืnewsman

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China Exclusive: Are human space babies conceivable? Tianzhou-1 experiment may give clue
2017-04-21 02:55:50 GMT2017-04-21 10:55:50(Beijing Time) Xinhua English
By Xinhua writer Yu Fei
BEIJING, April 21 (Xinhua) -- As astronauts continue to break records for time spent in space and manned Mars exploration is under discussion, scientists in China have begun a groundbreaking study to determine if humans can reproduce in space.
Scientists will for the first time conduct an experiment to induce the differentiation of human embryonic stem cells into germ cells on China's first cargo spacecraft, Tianzhou-1.
The experiment aims to study the effects of the space environment on human reproduction, beginning with the study of microgravity on human stem cells and germ cells, says Kehkooi Kee, lead researcher on the project.
Kee, a Malaysia Chinese professor at China's prestigious Tsinghua University, says the unprecedented experiment will study the basic development and maturation of germ cells in the micro-gravity environment, and the developmental potential of human embryonic stem cells.
The research is expected to provide a theoretical basis and technical support to solve the possible problems of human reproduction caused by the space environment, Kee said.
"It's an important experiment because it is the first step towards directly understanding human reproduction during space exploration," he says.
What kind of difficulties could people face by having children in space?
Experts say that in the known space environment, micro-gravity, radiation and magnetic fields could have a great impact on human reproduction. Among these factors, micro-gravity could be the largest challenge.
At the cellular level, micro-gravity might affect cell division or polarity. The cells of living organisms contain many organic molecules. These molecules and cells are evolved to function under the earth gravitational force. But scientists are still not clear how micro-gravity could affect the physical force governing the molecular interactions and developments of the cells, says Kee.
The United States, Russia and Europe have conducted many space experiments to examine if micro-gravity is harmful to astronauts, especially the effects on the muscle and bones. However, microgravity effect on human reproductive capacity has been rarely studied.
Previous research in this area mainly focused on monitoring the reproductive hormone levels of astronauts. Due to the ethical and physical constraints, it has been very difficult to directly obtain and study their germ cells.
"If we aim to directly study human reproductive biology in space, we need to build an in-vitro platform to study the germ cells. So we chose to use human embryonic stem cells to differentiate into germ cells," says Kee.
In 2009, he and his colleagues used human embryonic stem cells to create human primordial germ cells and sperm-like cells for the first time. They published their research in the academic journal Nature.
Currently, the team has successfully obtained egg-like cells from human embryonic stem cells and will be publishing this novel finding soon.
Human embryonic stem cells can be induced into primordial germ cells and further differentiate into sperm-like or egg-like cells. But differentiating embryonic stem cells into sperm-like or egg-like cells is very difficult because they require more developmental steps and more cellular factors, says Kee.
Although other scientists have conducted similar experiments, none has made human germ cells differentiate into such a mature state as Kee's team has.
"We have compared the in-vitro cultured cells with in-vivo cells, and found they have many similar characteristics. But we can only call the in-vitro ones sperm-like cells or egg-like cells, because we still can't prove they are exactly the same until we conduct functional experiments," Kee says.
So far, all such experiments have been conducted on the ground, so scientists do not know whether micro-gravity will affect the differentiation of human embryonic stem cells and the formation of germ cells.
"In the experiments on the ground, it usually takes six days to culture and obtain primordial germ cells, and about two weeks to form sperm-like or egg-like cells," says Kee.
"The experiment on Tianzhou-1 will last 30 days. To what extent the human embryonic stem cell can differentiate in space is still unknown. Will the process be delayed? If so, by how much?" asks Kee, adding they expect to see at least the first stage of the primordial germ cells appear.
Scientists on the ground will remotely control the research equipment to change the cell-culture medium to induce the human embryonic stem cells to differentiate into germ cells. Images of the cells under the microscope will be transmitted to earth.

http://english.sina.com/news/2017-04-21/detail-ifyepnea4429727.shtml

Offline Steven Pietrobon

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Here's an enhanced capture after separation. You can clearly see the four engine nozzles.
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Offline Satori

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Did anyone read something about a microsatellite that will be orbited from Tianzhou-1. There is some information about the satellite on Chinaspaceflight.com, named SilkRoad1-1: https://www.chinaspaceflight.com/satellite/silk-road/silk-road-1-01.html

Offline Satori

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Offline Satori

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« Last Edit: 04/21/2017 03:58 PM by Satori »

Offline ZachS09

At least they did a better job on the 360-degree view of Tianzhou 1 than the Cygnus OA-7 edition.
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Online Phillip Clark

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Yawn, early morning in the UK!   Any sign of live coverage of the Tianzhou 1 docking?   Not managed to find anything at present.

Online Phillip Clark

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Live coverage now on .

Online Galactic Penguin SST

TZ-1 has crossed the 400 meters holding point about 10 minutes ago. It will reach the 120 meter point in a few minutes.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Online Galactic Penguin SST

Coming in from the V-bar.
According to Chinese sources this time TZ-1 made a fly around before coming from the front of the V-bar - previous Chinese dockings have the active S/C chasing from behind.
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Tags: cubesat Silk Road-1