Issue 52

7 Jul 2022: The Russian Aerospace Forces (VKS) successfully launched GLONASS-K No.16L

navigation satellite on a Soyuz rocket from Site 43/4 at the Plesetsk Cosmodrome in

northwestern Russia, the fourth in the latest series of GLONASS navigation satellites

operated by the Russian Federation. The GLONASS-K satellites are substantial improvements

over the previous-generation GLONASS-M constellation, having a longer lifetime and better

signals accuracy. Launch Video. Extended Launch Preparation Video Here and Here.

– This marked the ninth launch of the year so far for the Russian Federation, with all of them utilizing various adaptations of the Soyuz launch vehicle. This was the fifth launch of 2022 for the Russian military. – The Soyuz vehicle used for the mission was the 2.1b variant, which flies with the standard Soyuz 2 booster and core stage engines, but features an updated RD-0124 motor on the Blok-1 second stage. – The GLONASS-K spacecraft is developed by ISS Reshetnev, with the first being launched in Feb 2011 and others following in Nov 2014 and Oct 2020, respectively. – GLONASS-K no.16L (Kosmos 2557) will replace Kosmos 2461, a GLONASS-M satellite launched by a Proton-M rocket from the Baikonur Cosmodrome in Mar 2010. – GLONASS-K No. 16 was completed in the Fall of 2021, or before the new export ban, which was introduced in the wake of the large-scale Russian invasion of Ukraine on 24 Feb 2022, and whose effects were yet to be assessed. At the time, there were eight GLONASS-K and four GLONASS-K2 satellites undergoing assembly at ISS Reshetnev in Zheleznogorsk and the head of Roskosmos, Dmitry Rogozin, promised the launch of "several" GLONASS-K and K2 satellites in 2022. – Each GLONASS-K satellite weighs in at approximately 935 kg (2,061 lbs) at liftoff — 500 kg lighter than its predecessor in GLONASS-M. The new satellites are able to operate for up to 10 years on orbit (three years longer than GLONASS-M) and have an increased power supply of 1,600 watts. – GLONASS satellite orbits are arrayed in three planes, separated from one another in right ascension of ascending node by 120 degrees, with eight satellites in each plane. The satellites within a plane are equally spaced, separated in argument of latitude by 45 degrees. Satellites in adjoining planes are shifted in argument of latitude by 15 degrees. – The satellites are placed into nominally circular orbits with a target inclination of 64.8 degrees and semi-major axis of approximately 25,510 km, giving them an orbital period of about 675.8 minutes. These satellites have ground tracks that repeat every 17 orbits or eight sidereal days.

GLONASS Constellation

Kosmos 2557

Original PDF links: Source 1 · Source 2 · Source 3 · Source 4 · Source 5 · Source 6 · Source 7 · Source 8 · Source 9 · Source 10 · Source 11 · Source 12 · Source 13

12 Jul 2022: China successfully launched a CZ-3B/E rocket with the third satellite of their

Tianlian 2 series of data and relay satellites from the Xichang Satellite Launch Center. The 7

operational Tianlian relay satellites are all located in geostationary orbit. They are similar to

NASA’s Tracking and Data Relay Satellite network and the European Space Agency’s

European Data Relay Satellite network. Overall, the Tianlian network consists of 4 first

generation and 3 second generation satellites. Launch Video.

– The first generation of TianLian ("sky chain”) satellites were built around the DFH-3 satellite bus and were launched between 25 Apr 2008, and 6 Jul 2021 using Chang Zheng 3C rockets from Launch Complex 2 at the Xichang Satellite Launch Center. – The second generation of Tianlian satellites are built around the DFH-4 satellite bus and have switched to the more powerful Chang Zheng 3B rockets launching from Launch Complex 3 at Xichang. – The second generation of the satellites introduced multi-targeting ability and improved data transmission rates into the overall network. – TL-2 uses K-band frequencies (TL-1 satellites used S- band) to enable 1.2 Gbps data transfer rates between the Chinese Space Station and ground control stations. – The satellites make real-time communications including video possible between the ground and the Tianhe space station module, where three Shenzhou 14 astronauts are currently living and working. See video on China's relay satellite capabilities. – Previous TianLian 2 launches occurred on 31 Mar 2019, and on 13 Dec 2021. – TianLian 2 (03) remains in GTO as of 16 July. It is likely destined for China's 10°E GEO slot. China

TL 2 (03) Current GTO

relocated TL-1 (05) closer to TL-1 (03) leaving the 10°E slot vacant.

10°E

TL-1(05) TL-1(05)

TL-2(01) TL-2(01)

TL-2(02) TL-2(02)

TL-1(02) TL-1(02)

TL-1(03) TL-1(03)

TL-1(04) TL-1(04)

Current TianLian Constellation

Original PDF links: Source 1 · Source 2 · Source 3 · Source 4 · Source 5 · Source 6 · Source 7

6 Jul 2022: Chinese commercial space companies are preparing to flight test newly-developed

orbital and suborbital launch vehicles at the Jiuquan spaceport. No launch dates have been set as

the Chinese government continues its efforts to foster a developing commercial space sector after

opening sections in late 2014. The move has so far brought a proliferation of solid launchers, with

mixed success. Liquid launch capabilities would represent a leap for the sector.

Landspace – Landspace is a Beijing-based launch startup working towards the launch of its Zhuque-2, methane and liquid oxygen rocket. – The Zhuque-2 mission is expected in the near future and would be the first launch of a liquid propellant launch vehicle by a Chinese commercial space company. See Hot Fire Test from 2021. – Landspace has constructed infrastructure at Jiuquan to facilitate methane and liquid oxygen launchers. – According to Landspace the Zhuque-2 will be capable of delivering a 6,000-kg payload capacity to a 200-km LEO, or 4,000 kg to 500-km SSO. – Zhuque-2 could become the world’s first methane-fueled rocket to make a launch attempt, with SpaceX also working towards a full test flight of the much larger Starship. – The Zhuque-2 will initially be expendable, but Landspace aims to convert it to make the first stage recoverable.

Hyperbola-2

iSpace – iSpace is developing its own methalox rocket, the Hyperbola-2. They recently unveiled a first stage test stand at Jiuquan in preparation for hop tests. See animated launch/landing rendition. – The hop tests will be carried out ahead of a potential orbital launch in 2023, with reusability a key target for the Hyperbola-2.

CAS Space – CAS Space is a spinoff from the state-owned Chinese Academy of Sciences and is also preparing to launch its ZK-1A (Lijian-1) solid rocket from Jiuquan. – The ZK-1A is reportedly capable of lifting 1,500 kg to a 500-km SSO, making it the most powerful solid launch vehicle in China, eclipsing the current Long March 11. – CAS Space is also working on larger solid rockets and reusable liquid launchers.

ZK-1A/Lijian-1

Jielong-3

China Rocket – China Rocket is a spinoff from the China Academy of Launch Vehicle Technology (CALT), has conducted a series of tests as it targets a first launch of the Jielong-3 solid rocket no earlier than September. See animated launch rendition.

Original PDF links: Source 1 · Source 2 · Source 3 · Source 4 · Source 5 · Source 6 · Source 7 · Source 8 · Source 9 · Source 10 · Source 11 · Source 12 · Source 13 · Source 14 · Source 15 · Source 16

– TJS-3 is relocating westward. As of 15 July, it had drifted ~865 kms from 59° E to 51.2°E. TJS-3 was in proximity with UAE communications satellite, Yahsat 1A, on 14 July 2022. – SY-12 (02) Continues Eastward Drift. Increased spacing with USA 270. In vicinity of CHINASAT 10 and Beidou 2 G7.

TJS-3: – In early Jul 2022, TJS-3 increased its altitude 50+ kms and initiated a westward drift. – As of 16 July 2022, TJS-3 was ~70km above the GEO belt and drifting 1°/day. – On 14 Jul 2022 TJS-3 was in vicinity of the Yahsat 1A communications satellite.

~865 kms

TJS-3 Maneuver July 2022

– Soon after its launch in Dec 2018 TJS-3 conducted a series of maneuvers with the TJS-3 AKM. Watch Video. – Chinese news media reported TJS-3 will test "double satellites co-position communications" as well as "multi-frequency and high speed comms".

TJS-3 Altitude Changes TJS-3 & Yahsat 1A Ground Tracks

Shiyan-12 (02) – No maneuvers were reported for Shiyan-12(02), it continues to orbit below the GEO belt and drift Eastward. – On 7 Jul 2022, Shiyan-12(02) was in the vicinity of Chinese satellites, CHINASAT 10 and Beidou 2G7. – Shiyan-12(02) does not appear to alter its orbit. – Shiyan-12(02) appears to be drifting East at a faster rate than USA 270.

SY-12 (02)

Chinasat 10

Beidou 2G7

SY-12(02)

SY-12 (02), CHINASAT 10 & BD 2G7

ChinaSat 10

Ground Tracks 7 July 2022

BD-2G7

USA-270

15 July Locations

USA-325

USA-270

SY-12(01)

SY-12(02) USA-271

TJS-3

USA-324

Editor's Note: Thanks to weekly reporting from Palski & Associates Inc, we're going to try to keep track of maneuvers of select spacecraft in GEO. We'll see how it goes! For this week, orbital information is courtesy of the 2022-07-08 & 2022-07-15, Space Domain Awareness Reports from Palski & Associates Inc. Send a request to david.pierce@palski.com to get added to their distro list!

Original PDF links: Source 1 · Source 2 · Source 3 · Source 4 · Source 5 · Source 6

14 Jul 2022: In conjunction with US President Joe Biden's visit to the Kingdom of Saudi

Arabia, NASA administrator, Bill Nelson, announced that Saudi Arabia became the 21st nation

to sign the Artemis Accords.

– The Artemis Accords are an agreement between the Governments of the States participating in the Artemis program. It defines the principles of cooperation and civil activities for the exploration and use of the Moon, Mars, comets and asteroids for peaceful purposes. – In addition to Saudi Arabia, these are the other Artemis Accord signatories: USA, Australia, Brazil, Great Britain, Italy, Canada, Luxembourg, UAE, Japan, South Korea, New Zealand, Poland, Israel, Mexico, Romania, Bahrain, Singapore, Colombia and France. Ukraine is also a party to the Artemis Accords. – The Artemis Accords were one of 18 agreements reached during the Presidential visit.

Rogozin Bounced as Roscosmos Chief

Original PDF links: Source 1 · Source 2 · Source 3 · Source 4 · Source 5 · Source 6

15 Jul 2022: Dmitry Rogozin, the blustering head of Russia’s state space corporation

Roscosmos, is out of the position following a big shake-up in the Russian government. He is

being replaced by Yury Borisov, Russian deputy prime minister of space and defense, bringing

an end to Rogozin’s dynamic reign as general director of the country’s space program. – Rogozin has been a controversial figure for most of that tenure, resulting in strained relations with NASA — Russia’s largest partner in space. Rogozin was sanctioned by the United States in 2014 and barred from entering the country due to his time as a deputy prime minister during Russia’s annexation of Crimea. – Rogozin became known for making wildly outlandish statements and threats, many of which put NASA in rather uncomfortable positions.

– When the US placed sanctions on Russian industry during the Crimea invasion in 2014, Rogozin said the move would hurt Russia’s space industry and that American astronauts — who relied on Russia to get to space back then — could use a “trampoline” to get to orbit instead. – More recently he has said NASA astronauts could use “broomsticks” to get to orbit. – NASA confirmed today that it has finalized an agreement with Roscosmos to perform an upcoming crew swap — where Russian cosmonauts will fly on future SpaceX Crew Dragon missions to the space station in exchange for American astronauts flying on Russian Soyuz capsules to the space station. – Rogozin's future role in the Russian government is unknown. Rumors have swirled in Russian media that he might find himself in a new position overseeing territories in Ukraine during the invasion.

Original PDF links: Source 1 · Source 2 · Source 3 · Source 4 · Source 5 · Source 6 · Source 7

Jack's Astro Corner: Inclination – The Tilted Element (Part III) Over the summer, Jack Anthony will break down each of the six orbital elements required to

uniquely identify a specific orbit and satellite in that orbit. This week we examine inclination.

For those who can't wait the entire summer, please visit Jack's “Orbit Element Dance” on

YouTube” and you'll find a 1:02 video featuring Jack in his driveway demonstrating this highly

effective way to learn about the 6 classical orbital elements (COE). Each movement ties to an

important astrodynamics principle. Below is a screen grab from this video. As you can see,

Jack uses the STP method of remembering the 6 COEs. Size, Shape, Tilt, Twist, Position of

Perigee and Position of the Satellite at a particular time. Boogie Down. –

You are HERE

We are now moving into the “T’s” of the STP method of remembering the Classical Orbital Elements. TILT is for orbit Inclination. I’m sure by now you have learned the Orbit Element Dance, the dance move for TILT is a crisp bend forward (please mind the hamstrings). To get us started, I’m going to introduce some inclination definitions. I will define several inclination buzz words so you can use them and dazzle friends, family and Generals. We will learn about the significance of the inclination 63.4° as well the many satellites in the vicinity of 98° (no relation to the 1990s Boy Band…which apparently is still going strong).

Most Astro enthusiasts will tell you “Inclination measures the tilt of the orbit away from the equatorial plane.” This is about right, but begs the question, “which way do you measure from the equatorial plane to the orbit plane?” As long as you make that clear, you should be OK. Let’s look at the REAL definition of inclination and how to solve for its value. We’re going to talk vector math….don’t panic! I just love vectors (inclination and the remaining 3 orbital elements involve angles between vectors!) Inclination is defined as the angle between the K axis of the Earth Centered Inertial (ECI) coordinate frame and the orbit angular momentum vector, denoted the h-vector. Let me show you in a simple illustration I made where the IJK red coordinate frame is the ECI coordinate frame and the h-vector is shown in green, it’s perpendicular to the orbit plane. Do you see the angle between K axis and the H-vector?

Jack's Astro Corner: Tilt (Cont)

Here are two illustrations from my favorite astrodynamics book by Bate, Mueller and White

“Fundamentals of Astrodynamics”, fondly called BMW (it was

recently updated, Bill Saylor is the 4th author now). You’ll see

the ever popular Earth Centered Inertial coordinate frame.

Look close at the I and J or X and Y axis. They form the

fundamental plane, it’s the equatorial plane. The K axis

is the Earth’s spin axis, it is perpendicular to the equatorial

Right Hand Rule

plane. There’s a lot more science and details to this, but this is

the basic stuff of ECI. Remember the K axis, because we are

now going to introduce the h-vector.

What’s this h-vector? It’s the angular momentum of the orbit. Here’s where you get to

demonstrate your right-hand rule “astro gangster” sign. If you take your right hand and form a

two finger and thumb coordinate frame you are cool! Then if you curve your fingers in the

direction of orbit travel, your thumb will point in the direction of the h-vector. Here below is an

illustration from BMW that shows angle between h-vector and k-vector.

Inclination = Angle between h-vector and K-vector

You’ll see the Astro smarties doing this all the time. It shows the right-hand coordinate system.

Here I am a few years back with several Weapons School/Astro experts showing off the right-

hand rule also known as the “Astro gangster” sign.

I can see you are itching to learn how to calculate the angle between

2 vectors. The dot product of two vectors equals the Cosine of the

angle between them. Let’s try it. In vector notation, K-vector is

simply [0, 0, 1), h-vector of the orbit is [-1, +2, -0.3]. What’s the

"Astro Gangster Sign"

in the Wild

angle between them? (Checkout this online tool. What answer did

you get? (answer: 97°)

Jack's Astro Corner: Tilt (Cont)

If you ask around or surf the internet you’ll probably get

a few different explanations for inclination. I’ll use the

NASA drawing to show this. It shows Inclination is the

angle between an equator’s plane the Earth Centered

Inertial (ECI) coordinate frame and the orbit’s plane. Here

we see a straight on view of the ascending node of the orbit.

To me this looks like a 45° inclined orbit. The maximum latitude it will fly directly over is 45° North

and South. Make sure you keep track of the ascending node passage and which way the satellite is

heading; 45° and 135° can look alike. With the h-vector definition previously explained this is

clearer. No worry, you’ll figure it out, right Bueller?

Now that you know what inclination is, let’s learn the “lingo” of this “tilted” orbit element called

inclination. For orbits with an inclination of more than 90° we call them retrograde. If less than 90

degrees, we have a prograde or direct orbit. If the inclination is

zero degrees, we call that an equatorial orbit. Very popular for

the geosynchronous satellites. I mentioned 90 degrees earlier,

that’s a Polar orbit. The polar orbit has a ground track that flies

over the poles. Here’s a weird one nobody has tried, an

inclination of 180 degrees. It is called a retrograde equatorial

orbit. Have you ever heard of a sun-synchronous orbit? Well,

hang on, we first must learn about some orbit perturbations

that affect an orbit and that can be used to create an orbit of great operational benefit.

The central gravitational force of the Earth is what makes satellites orbit the Earth. We assume a

spherical Earth and that’s pretty good for starters. But in reality, it’s not a spherical point source of

gravity. The Earth has oblateness, that is it's squished a little and football shaped, wider at equator

and shorter to the poles. Can’t really see it, but this is true. This causes some additional forces to

be put on an orbiting satellite. The biggy Earth oblateness effect is called the J2 effect. It has an

effect mostly the right ascension of the ascending node (RAAN) (twist) and the Argument of

Perigee (defines where the closest approach to Earth is). You can get a constant change over time

in those orbit elements; it’s called a secular perturbation. The equation that determines the

motion of perigee due to J2 can be solved to find the inclination where perigee will not drift. There

are two specific inclinations where the rate of change of perigee movement due to J2 is zero. Holy

cow, now that can be helpful. The answer is 63.4 and 116.6 degrees and it’s called the critical

inclination. Remember the HEO orbit? Well, if you launched into 63.4-degree inclined orbit and

had perigee positioned in the southernmost part of your orbit, then it would not drift away from

there and rotate away from this southernmost point. That’s helpful for keeping the “hang time”

part of the orbit (apogee) over the northern hemisphere. Remember that from the Eccentricity

article?

Let’s look at another source of forces on a satellite in its orbit: The Sun and the Moon gravity. For

the GEO satellites, the Sun and Moon’s gravity play a big role in what happens to their inclination.

Jack's Astro Corner: Tilt (Cont)

These gravitational bodies are far away, but do “pull” on the GEO birds and thus create something

called the 54-year cycle. If the orbit inclination is left to its own, that is not “north-south”

controlled, the inclination will go through a 15-degree span in 54 years. Again, it can get really

complicated as to how this plays out, but inclination goes for a 15-degree cycle in 54 years. Most

GEO satellite operators don’t allow this to happen. They activate their propulsion systems to keep

the inclination at zero or within certain limits.

Last thing, remember I mentioned

sun-synchronous orbit? Well, let’s learn what

inclinations support that orbit. It is a VERY

popular orbit for Earth observing space

systems (imagery). Here’s superb illustration

courtesy of Technobytes.org, it shows what’s

going on with the sun-synch orbit.

The orbit plane maintains it’s orientation to

the Sun. This is helpful since you can fly over

a place of interest every day at the same local

time and have the same Sun illumination

orientation of the place below, photo analysts

dig that. This is orbit plane movement caused by the J2 perturbation. Let’s look at an example

below.

What are the sun-synchronous orbit inclinations? Here’s a

plot that helps answer that. Thank you SpaceDaily.com for

this plot. Let’s say you are in an 800 Km circular altitude

orbit, well, if you launched into a 98.6 degrees inclined

orbit, your orbit plane will remain in the same orientation

to the Sun. You set your launch time to get the timing you

want. Why does this happen? Well, you get the RAAN to

drift about +1 deg/day. This is about how much the Sun

moves about the Earth per day. So, the angular

relationship holds steady as the earth orbits the Sun and

your orbit plane moves +1 deg/day. Now you know about

the sun-synchronous orbit. Pop quiz, what is the inclination

needed for a 400 km circular orbit altitude? “Anyone, anyone? Bueller?"

Next time we’ll learn about TWIST, the Right Ascension of the Ascending Node (RAAN). Be sure to

practice your orbit element dance. I’m sure your Guardian shipmates will value you demonstrating

it, maybe during a senior office visit to your unit. I want to thank 3rd Test & Evaluation Squadron

Commander Anna “Sumo” Gunn-Golkin for reviewing a draft of this article. She was a great Astro

teacher at USAF Academy and today leads the premier test squadron in Space Force. Yay Anna!

Finally, General Willie Shelton also took a look and helped tweak this essay.

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Pics o’ the week!

Saturn’s Aurora

The Apollo “Rubber Room” at LC-39.

Albert Einstein and Marie Curie chatting by a lake circa 1929.

Original PDF links: Source 1 · Source 2 · Source 3

For those of us who grew up in the 70’s.

Fun Fact: After Space Shuttle Discovery’s External Tank was damaged by woodpeckers, NASA deployed bird deterrent balloons – and it worked.

Original PDF links: Source 1 · Source 2

Hubble vs. JWST diffraction spikes, plus early JWST imagery.

Original PDF links: Source 1 · Source 2

Breath Easy Dad – April 1944 – July 2022.

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