Twenty minutes later, the walking car arrived at the half-foot lake.

It came to a halt on a piece of hard ice, and it was only then that Steng and Liu realized that they had overlooked an obvious problem.

The lake has frozen.

The main content of the lake is methane, and the melting point is minus 182 degrees Celsius, and the temperature in the Shangri-La Plain has dropped below the melting point of methane at this moment, and the whole lake is frozen hard.

Liu Peijia pulled off the filter mask of Tiefutu, jumped off the walking car, stepped on the hard ice, and looked around left and right, "This is the half-foot lake?" ”

It looks like the lake is no different from the rest of the place, the headlights still shine on the snow half a meter deep, and the lake is buried under the snow.

If it weren't for the white tip, they wouldn't even know they've arrived at their destination.

"Are you sure this is a suitable place to land?" Liu Peijia asked.

Ston stood on the other side of the walker and took two steps forward, standing in the snow, casting the pillar of light from his headlamp into the darkness of the night.

There was a mist on the surface of the lake, and the light didn't reach far before it diffused into the air.

"Do you know the three requirements for a spacecraft to land?" Stong said.

Liu Peijia was stunned for a moment.

"Weather, venue and luck?"

"Nope." Stong turned his head, "It's experience, calmness, and guts. ”

Two small figures stood by the pedestrian car, standing on a wide half-foot lake, with a dark canopy and mist overhead.

"So do you think the rescue ship will make a successful landing here?" Liu Peijia asked.

"If the pilot of the ship is half as good as me, then landing should be fine." Steng beckoned, "Go back to the car, we need to take a turn here." ”

The two returned to the walking cart and went into airplane mode.

The scorching air flow immediately melted the ice of the half-foot lake, the solid methane melted and evaporated in a very short time, and the high-speed air jets from the lift channel of the walking car could directly touch the absolutely dry bottom of the lake, but a few meters away, the liquid methane surged in a circle, and a little farther away, the methane was condensed into a solid state.

The walking car hovered over the half-foot lake at the height of a ground-effect aircraft, and Steng steered it to move slowly, while Liu Peijia slammed on the center console.

He's trying to get the radar back to work.

In current lighting conditions and visibility, radar is much more useful than the naked eye.

"I'm Stout, I'm Stout...... Can Cassini Station hear me? We've arrived at Half a Foot Lake. Stong called Cassini Station in the channel, and at the same time motioned to Liu Peiji to switch the radar on the car to synthetic aperture mode, "Synthetic aperture...... Synthetic Aperture, SAR! ”

"I didn't know it was SAR, but the problem was that the broken radar was not flexible!" Liu Peijia scolded and slammed the screen on the center console.

The screen flickered, and finally the SAR icon lit up, and the walking car's radar switched to synthetic aperture mode.

"I'm Mumu, Brother Shi, eggplant, and the signal is quite stable." Mu Mu replied.

"I need Dabai to plan a scanning path."

"Roger." Dabai immediately replied, "The path is being planned. ”

The walking vehicle flies at a low altitude, and the synthetic aperture radar scans from top to bottom to gradually construct the geomorphological features around the walking vehicle, and the synthetic aperture radar is used to do this.

The vehicle's on-board synthetic aperture radar was originally very accurate, in the words of the designer, this radar can be used as a microscope, but now in Liu Peijia's view, this thing is like a crappy art student who is learning to sketch, trying his best to ensure that the painted objects will not be out of shape, and it tremblingly outlines the terrain on the monitor - the half-foot lake is extremely flat, and the layer of loose and porous material covered on the surface of the lake is snow, which will not become an obstacle to the landing of the spacecraft, and it will volatilize instantly under the high temperature of the engine.

Stung had to find a site that was large enough and flat enough for the rescue ship to land, and if the ship landed vertically, it would be better to say, and if it was a run-and-run landing, it would take at least two kilometers of runway.

"Very good, we can make a mark here." Steng nodded, looking down through the windshield, "There's a mark, and the ship will know where to go...... Cassini Station, I'm Steng, is in good condition on the half-foot lake and can be used as a preparatory landing ground. ”

"Then I'll expand the scanning area."

Liu Peijia pressed the button on the screen and slowly pushed forward.

The on-board radar of the walking car increases the power, and the phase of the radar wave changes accordingly, and in the microwave field invisible to the human eye, this car is the brightest large light bulb on the half-foot lake.

The scanned image on the screen expanded, and with the walking car as the origin, the blue circle of light spread out in waves, bringing the landscape on the half-foot lake into the field of vision of the two of them little by little.

The surface of the snow is not necessarily flat, they are as soft as cotton, so they are like still water in the feedback of the radar, and there is a layer of plane half a meter deep below them, which is the hard lake surface touched by electromagnetic waves after penetrating the snow layer, Liu Peijia stared at the monitor, the walking car was flying according to the path planned by Dabai, and the half-foot lake flew by under the illumination of the synthetic aperture radar.

"Everything is normal, how far have we flew?"

"Two kilometers." Sten glanced at the meter, "Five square kilometers." ”

"Almost, there's nothing so far, it's appropriate, let them land here then."

If there is a cracked lake or crater under the snow, the radar can detect it keenly, but so far nothing is unusual...... Suddenly, the corners of Liu Peijia's eyes jumped violently.

"Stop, stop! Old history! There's something, there's something! ”

Liu Peijia subconsciously yelled.

It's not a crack or a pit, it's a huge unidentified object, the soft blue lines that make up the snow layer on the monitor suddenly become sharp, and then suddenly straighten, forming a regular object at a speed that everyone doesn't have time to react, it almost makes Liu Peijia's heart stop, Liu Peijia feels that seeing his ECG lines suddenly flatten out is not as terrifying as the lines on the radar monitor suddenly take off, it is buried in the snow, with sharp edges and straight lines.

The thing was gradually brought into the radar's detection range, revealing only the tip of the iceberg at the edge of the display.

At this moment, Liu Peijia thought he had seen the pyramid.

"What is this?"

Stong muttered.

The walking car slowly approached, the target object was more and more included in the radar irradiation range, the two stared at it for a long time, it was not a pyramid, half of it was a regular cylinder, but the other half was broken, damaged, and even full of holes, Shi Teng and Liu Peijia could even see the debris scattered in the snow.

Obviously, this time it is not a radar false alarm, and the false alarm will not have such a clear feedback.

"I'm going to ......," Liu Peijia exclaimed in a low voice, "Grandma's." ”

"Cassini Station, Cassini Station! It's a walking car, I'm Steng! I'm Stong! Please answer when you receive it! Stong quickly approached the walking cart and shouted, "We found a crashed spaceship on the half-foot lake!" ”