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Ludi Tance-4 01 - CZ-3B/G3 - Xichang - August 12, 2023 (17:26 UTC)
by
mikezang
on 30 Jun, 2023 06:26
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#1
by
Satori
on 02 Aug, 2023 07:52
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Is this NOTAM still active?
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#2
by
Galactic Penguin SST
on 02 Aug, 2023 08:07
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Is this NOTAM still active?
Yes (although it's active 17:00 - 21:00 UTC, August 11-14).
BTW you can check it from
here by searching through "Free Text" (e.g. P3120/23, Q1638/23) and see if it's there. If not, you can check via "Archive Search", select the date of posting (e.g. 2023-06-30) and Flight Information Region (e.g. RJJJ) and see if it's cancelled or not.
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#3
by
Satori
on 02 Aug, 2023 08:15
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Is this NOTAM still active?
BTW you can check it from here by searching through "Free Text" (e.g. P3120/23, Q1638/23) and see if it's there. If not, you can check via "Archive Search", select the date of posting (e.g. 2023-06-30) and Flight Information Region (e.g. RJJJ) and see if it's cancelled or not.
Great, thanks!
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#4
by
mikezang
on 04 Aug, 2023 00:27
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The payload is Ludi Tance-4A (陆地探测四号A) and luanch number is Y92.
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#5
by
Galactic Penguin SST
on 08 Aug, 2023 06:32
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The payload is Ludi Tance-4A (陆地探测四号A) and luanch number is Y92.
Since the "LTDC" series current has only 2 known satellites - LTDC-1A & B = L-SAR-01A & B, the 2 L-band SAR satellites launched early 2022, I wonder if LTDC-4A is = "20 m resolution high orbit SAR satellite" mentioned in CASC's Bluebook of China Aerospace Science and Technology Activities 2022, released this January. It certainly fits the literal meaning of "LTDC" - "Land Probing".
https://twitter.com/AJ_FI/status/1616035599999471616
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#6
by
mikezang
on 08 Aug, 2023 08:38
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#7
by
mikezang
on 11 Aug, 2023 11:30
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#8
by
mikezang
on 11 Aug, 2023 12:57
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#9
by
mikezang
on 11 Aug, 2023 13:44
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#10
by
Liss
on 12 Aug, 2023 11:48
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#11
by
mikezang
on 12 Aug, 2023 12:55
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#12
by
Bean Kenobi
on 12 Aug, 2023 14:00
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Today is August 12th, not 13th, date in thread title has been wrongly updated today
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#13
by
mikezang
on 12 Aug, 2023 14:04
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Today is August 12th, not 13th, date in thread title has been wrongly updated today
You're right, I just confused UTC and local time.
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#14
by
Satori
on 12 Aug, 2023 18:19
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Waiting for news from Xichang...
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#15
by
Liss
on 12 Aug, 2023 18:24
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Launched:
https://weibo.com/5386897742/Nej37Ai0O8月13日1时26分，长征三号乙运载火箭在西昌卫星发射中心点火升空，随后成功将陆地探测四号01星送入预定轨道，发射任务取得圆满成功。（高剑 摄）
At 1:26 on August 13, the Long March 3B carrier rocket was ignited and lifted off at the Xichang Satellite Launch Center, and then successfully sent the Land Probe 4-01 satellite into the predetermined orbit, and the launch mission was a complete success. (Photo by Gao Jian)
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#16
by
Liss
on 12 Aug, 2023 18:54
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Please note the English version of the name.
https://english.news.cn/20230813/73448a8a70c54177abe97724a8354889/c.htmlChina launches new satellite
Source: Xinhua Editor: huaxia 2023-08-13 02:43:15
XICHANG, Aug. 13 (Xinhua) -- China on early Sunday sent a new satellite into space from the Xichang Satellite Launch Center in southwest China's Sichuan Province.
The satellite, L-SAR4 01, was launched at 1:26 a.m. (Beijing Time) by a Long March-3B carrier rocket, and entered its planned orbit successfully.
The satellite will be mainly used to provide remote sensing information services.
The launch was the 483rd flight mission of the Long March carrier rocket series.
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#17
by
Satori
on 12 Aug, 2023 18:57
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#18
by
Satori
on 12 Aug, 2023 19:11
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#19
by
mikezang
on 12 Aug, 2023 19:26
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我国成功发射陆地探测四号01星my country successfully launches Land Probe No. 4 01 satellite
Land Probe 4-01 satellite is a remote sensing scientific research satellite in the "National Civil Space Infrastructure Medium and Long-term Development Plan (2015-2025)". The satellite operates in an inclined geosynchronous orbit, and the synthetic aperture radar payload carried has the advantages of high resolution, wide coverage, multi-mode, and light weight. Compared with low-orbit satellites and optical satellites, this satellite combines the advantages of short high-orbit observation revisit period and wide imaging width with the advantages of microwave observation that are not limited by climate (all-weather) and light (all-day) , can improve the identification accuracy and efficiency of disaster abnormal change information, and enhance the comprehensive prevention and control capabilities of natural disasters. After the satellite is launched into orbit, it will enrich the means of observation in key areas of our country. It will be able to conduct all-weather and all-weather observations of my country's mainland and surrounding areas, and meet the needs of disaster prevention and mitigation, earthquake monitoring, land and resources survey, and marine, water conservancy, meteorology, agriculture, Environmental protection, forestry and other industry application requirements.
This is a IGEO sat.
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#20
by
FutureSpaceTourist
on 12 Aug, 2023 20:24
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#21
by
Galactic Penguin SST
on 12 Aug, 2023 21:56
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#22
by
FutureSpaceTourist
on 12 Aug, 2023 22:16
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#23
by
Vahe231991
on 13 Aug, 2023 03:51
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#24
by
Steven Pietrobon
on 13 Aug, 2023 04:20
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Pixel counting using a third stage diameter of 3.0 m, I get 4.15 m for the fairing, which indicates this is a CZ-3B/G3 with a 4.2 m fairing (the CZ-3B/G2 has a fairing diameter of 4.0 m).
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#25
by
mikezang
on 13 Aug, 2023 04:21
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The number is Y92.
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#26
by
FutureSpaceTourist
on 13 Aug, 2023 07:01
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#27
by
FutureSpaceTourist
on 13 Aug, 2023 07:33
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#28
by
Alter Sachse
on 13 Aug, 2023 09:29
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I think in the foreground we see LC3 and the launch was from LC2.
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#29
by
Alter Sachse
on 13 Aug, 2023 12:38
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They call him GEOSAR.
Is this the long awaited GEOSAR ?
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#30
by
FutureSpaceTourist
on 14 Aug, 2023 03:47
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#31
by
input~2
on 22 Aug, 2023 15:33
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#32
by
Steven Pietrobon
on 23 Aug, 2023 05:45
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A wild guess to what the ground resolution is. Ideal resolution for a fixed mirror is given by
d = 2*R*tan(1.22*c*180/(2*f*D*pi))
d = ground resolution (km)
R = distance to ground (at best 35,786 km)
c = speed of light (299,792,458 m/s)
f = frequency (guess about 40 GHz. the upper edge of Ka band)
D = antenna diameter (guess about 15 m)
which gives d = 22 km. As SAR is being used, the resolution should be a lot better, but I don't know how to calculate that.
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#33
by
input~2
on 23 Aug, 2023 09:16
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Satellite LAN could be 90°E
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#34
by
input~2
on 24 Aug, 2023 12:49
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Satellite LAN could be 90°E
Confirmed with last TLE from SpaceTrack at epoch Aug 22, 23:11 UTC
LUDI TANCE-4 01A geostationary at 89.2°E inclined orbit: 16.1°
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#35
by
Liss
on 24 Aug, 2023 14:06
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An image of the spacecraft:
