I changed the timeline with the game.

Chapter 1160 Su Wen: The Scholar Who Analyzes the Sky

Chisaki Tsukishima's identity was actually quite sensitive before, as not only were cult organizations investigating her, but even the Night Watchers were looking for them.

That's why Xiaoye acted alone before.

Now that the prelude to the sinking of Tokyo has fully begun, her existence will no longer attract much attention.

Moreover, Chie's mother also needs someone to protect her.

But now, it is perhaps most appropriate for her to take on the task of photographing the blueprints left by Chie's grandfather in the oak box.

After obtaining Natsume Chie's permission, Su Wen contacted Ms. Tsukishima.

Three minutes passed.
One by one, the drawings were transmitted from the terminal on the Dawn band.

As these drawings were projected,

To prevent any malice from remaining with Faista, Su Wen set a time limit for reloading the save file, which is why he released the blueprints of Chie's grandfather.

During the announcement,

The handsome scholar was also examining the entire set of blueprints sent by Tsukishima one by one.

When he saw one of the photos, only a fleeting glint of thought crossed his calm glasses.

It was a piece of kraft paper with curled edges:
"There are strong signs of it being browsed."

Unlike the pencil lines on other drawings, this paper has a series of tiny markings in blue-black ink in the lower right corner.

It looks like it was deliberately engraved into the paper fibers; you can't notice it unless you look closely.

But Su Wen viewed it using the system.
Therefore, scaling the image will not result in a loss of clarity.

Thinking of this, he immediately paused the game and began using the academy's supercomputer to zoom in on the scale to the sub-differential pixel level. A set of numbers then appeared on the screen:
1:1.496×10.

"It is the scale of astronomical units (AU)."

Su Wen's voice was deeper than when he was analyzing the gear assembly. His fingertips slid across the screen, and he resumed his communication with Fausta:

"1 AU is equal to the average distance from the Earth to the Sun, approximately 1.496 million kilometers."

This set of graduations corresponds to the standard unit for measuring distances to celestial bodies in the solar system.

Hearing him say that, Justa and Chie Natsume moved closer from either side.

Even Astana's glowing long hair fell over the edge of the tablet he created using data projection, reflecting the screen light into her eyes:

"Cephalexin's star map system does indeed have similarities to the AU you just mentioned as the base scale."

When we established observation points on the remnants of several major Fourth Era star systems, we also used this scale to mark planetary orbits.

Hearing her say that, Su Wen didn't reply immediately, but he already knew what was going on.

He overprinted a map of Tokyo onto the scanned data map, and then retrieved the solar system planetary calendar from ten years ago (2015), the year that Natsume's grandfather left the map.

then,

The handsome scholar circled only the five points marked in red on the drawing with dots of light:

Moon Island Canal Warehouse Area

Odaiba Seaside Park

Former site of Mitaka National Astronomical Observatory

Former weather radar station on the Izu Peninsula, and communication station on the Chiba Makuhari coast.

And seeing the familiar notes

Natsume Chie seemed to remember something as well:
“My grandfather took me to all these places.”

At the same time, Alfasta has converted the latitude and longitude of each point (35°-36° north latitude and 139°-140° east longitude of Tokyo) into right ascension and declination in celestial coordinates and input them into the planetary orbit calculation model.

This is something Su Wen just asked her to do.
Su Wen feared that he would be caught and reported to old Constance by the AI ​​lady of Breeze City within two seconds for using Lorenz Rael's computing power to calculate these specific data.

This is not the right choice.

Moreover, Asta itself has strong computing power, so why not use it?

In an instant, the computational model appeared before the three of them like a three-dimensional mapping.

Even Caroline, who had just appeared and was originally going to tell Su Wen some good news, gently covered her rosy lips.
It can be seen that,
Her data is much more stable now than before.

But the hacker girl, unusually, didn't disturb Su Wen, who was calmly deducing the situation.

"look here."

The handsome scholar tapped on the overlapping lines on the screen.

"The latitude and longitude of the Tsukishima warehouse district in Chie's memory, converted to ecliptic longitude, is about 135°, which corresponds to the perihelion ecliptic longitude of Jupiter ten years ago:"

At that time, Jupiter was in Pisces.
The ecliptic longitude is 134.8°, with an error of no more than 0.2°.

He then pointed to the Odaiba waterfront.

"The ecliptic longitude here is 139.5°, which is exactly the ecliptic longitude of Saturn's orbit back then. Moreover, the ellipse symbol marked on the drawing has a diameter that is 1.8 times that of the axial symbol of the triangular space, corresponding to the ratio of Saturn's equatorial diameter to Jupiter's (Saturn is about 12 kilometers, and Jupiter is about 14 kilometers, with a ratio close to 0.85).

Thinking of this, he suddenly paused.
He then revised his judgment.

"No, we should now analyze it according to the proportion of the semi-major axis of the orbit. Saturn's semi-major axis is about 9.5 AU, and Jupiter's is about 5.2 AU. 9.5/5.2≈1.8, which matches the sign size perfectly."

Chie Natsume stood nearby.

Looking at the line on the screen where the planetary orbits coincided with the Tokyo location, she couldn't understand it at all.

But for some reason, the little girl also recalled the scene when her grandfather took her to the Mitaka Observatory when she was a child:

"Ten years ago, in the autumn, my grandfather took me to Mitaka to see the stars. He pointed to the telescope and said, 'The lenses there can capture the light of Jupiter, just as gears can capture the force of rotation.'"

Was that statement also related to the secret left by my grandfather?

"right,

It seems your grandfather really wants you to solve this problem yourself.
Chie.

The former site of the Mitaka Observatory is the third key location.

Su Wen retrieved the elevation data of the location (approximately 150 meters) and the electromagnetic environment report that Caroline had previously obtained from Deep Tokyo.

Because Deep Tokyo stole some of Tokyo's knowledge, much of its content is actually disorganized and useless.

It's rare to find something that's actually usable:
"The Mitaka Observatory is located at an altitude higher than Tokyo city, and there are no high-power electromagnetic devices nearby. The electromagnetic interference level is only 0.3 μV/m, far lower than the 2 μV/m in the city center."

Therefore, it fully meets the electromagnetic environment requirements for deep space signal reception.

More importantly, its declination of +35.7° corresponds to the declination value of Mars ten years ago.

The '□' symbol marked on the drawing has the small text 'λ=13cm' next to it, which is the wavelength of the S-band. After all, the S-band frequency is about 2.3GHz and the wavelength is 13cm.

This is a commonly used deep-space communication frequency band for NASA's deep space network, which is suitable for penetrating the ionosphere and reducing signal attenuation.

This is an echo from the universe.

Hearing that he actually knew these things, Caroline's eyes lit up for once, even though she had always wanted to hack into NASA.

But the clever hacker didn't disturb her; she simply admired Su Wen quietly.

Admiring this genius who analyzes the sky.

At this moment, the handsome scholar merely lifted his glasses slightly, and his slender fingers continued to move towards the old radar station on the Izu Peninsula:
Similarly, the latitude and longitude of the old radar station, converted into orbital parameters, corresponds to Uranus's semi-major axis of 19.2 AU.

It is exactly the length of the red line from Mitaka to Izu on the drawing, which, when calculated at a scale of 1:1.496×10, is exactly 19.2 AU.

Moreover, this radar station was built in the 1960s and originally had a 25-meter diameter parabolic antenna base.

Your grandfather probably valued its antenna's load-bearing structure back then, as it didn't require rebuilding the foundation; he could simply add a signal converter to make it work.

Therefore,
This is the fourth step he took:
Without going through a gravitational wave tunnel like the Lost Sea, he chose a deserted, nearby area to send a message to Fausta.

But ultimately, that information was intercepted by the 'shell'.

It's a pity, the scale he was implying was already almost perfect.

(End of this chapter)