Let the United Space Station use the camera to find the old cat in orbit, this is also the method that Tang Yue really thought of when he was forced to be in a hurry, and it was the last straw. The Joint Space Station is actually not suitable for this kind of work, because it is not a spy satellite after all, and it does not have such high-precision optical observation equipment, and it is necessary to accurately distinguish a Mars rover less than 10 meters long at an altitude of three or four hundred kilometers, which can only be done by the Keyhole Satellite of the US National Reconnaissance Office.

The Joint Space Station once undertook the Mars remote sensing and observation mission, which carried a spectral scanner and synthetic aperture radar, but such equipment is used for large-scale geological terrain exploration and mapping, and cannot accurately determine the location of a car, and the only high-precision camera on the space station is still in the Dawn module, which has now been destroyed along with the module.

Mai Dong searched for telescopes and cameras in other modules, hoping to find some useful equipment - Mai Dong remembered that there was also an optical observation system in the Discovery module, which had been used to assist in the rendezvous and docking of spacecraft, and that it might be possible to spot the approaching Orion spacecraft from 200 kilometers away, and to search for Martian stray dogs.

Tang Yue opened the map and marked the location of Kunlun Station on the map, "This is the location of Kunlun Station, 87 degrees east longitude, 12 degrees 54 minutes north latitude, which is the starting point of the old cat's action." ”

Mai Dong nodded.

Tang Yue then marked the location of the Cherome probe on the map, "This is the Cherome, the end of Operation Old Cat. ”

He connected the two points with a clear red line, and the computer quickly gave a straight-line distance between the two: 95.23 kilometers.

"We'd better scan every inch of land that the old cat could possibly pass through, and every corner of the land must not be missed." Tang Yue rotated the map, and he made vertical line segments at the two ends of this red line, and the two line segments were divided by the ends, both of which were two kilometers long, and then he used these two line segments as the basis to add two long sides to complete a narrow rectangle.

Tang Yue marked all the areas covered by the rectangle in red.

"This is the area where Mr. Cat could exist?" Mai Dong looked at the map.

"The old cat will return as soon as it finds the Chelome, so its location can only be between the Kunlun station and the Chelomé's landing site, that is, within these ninety-five kilometers." Tang Yue explained, "We expanded the width of this straight line by one kilometer to the left and right...... Then this corridor 95 kilometers long and two kilometers wide is the activity range of the old cat, and its range of activity should not exceed this area. ”

Mai Dong looked closely at the map, and the red rectangle drawn by Tang Yue was very conspicuous, which was a huge rectangle 95 kilometers long and 2 kilometers wide. Tang Yue's speculation is still very reasonable, leaving enough redundancy, the old cat's route may not be a strict straight line, but no matter how much it turns, it will not go around the width of these two kilometers.

As long as they search the area carefully, they will definitely find the old cat.

But this area is a full 190 square kilometers.

"Good...... I'm going to get ready and start taking pictures when the space station passes over your heads. Mai Dong said that she would do it, but there was a hint of concern in her tone, "But this area is too large, and the field of view of the camera in my hand is very small at the highest resolution accuracy...... If you scan all of them without landing an inch, the image data obtained may be very large. ”

It's common sense that for optical observations, the larger the image, the smaller the observed area. Mai Dong had to adjust the magnification of the observation system to the maximum in order to search for Martian stray dogs, so correspondingly, the area she could observe would also be reduced to a minimum.

"The optical tracker on the space station has a maximum resolution of five meters, but at this time its field of view is only 2,000 square meters." Mai Dong calculated, "If a photo covers an area of 2,000 square meters, then it would take 95,000 photos to completely scan the entire corridor." ”

This number is staggeringly large, assuming that every photo taken by Mai Dong can be seamlessly connected, covering all areas, and it will take 95,000 photos to completely shoot this corridor, but the actual implementation will definitely not be so ideal, then the final number of photos may exceed 100,000.

And Tang Yue and Mai Dong are only two people, they have no automatic scanning, no automatic shooting, and no automatic identification, everything can only rely on the naked eye and hands, not to mention the final photo identification, just the work of taking pictures is an out-and-out big project.

What's more, the matter of taking pictures can only rely on Mai Dong, and Tang Yue can't help.

Tang Yue thought for a while, "If you feel too tired and troublesome, we can compress the work ......"

"No, no, no, no, I'm not tired, and I don't feel troublesome." Mai Dong hurriedly shook his head, "I just said that with such a huge number of photos, Tang Yue, you will definitely not be able to be busy alone, and it is easy to make mistakes in your busyness, so I can also help you share half of it, and we will cross-check, so it will not be easy to miss clues." ”

Tang Yue was stunned for a long time before nodding.

"Okay, let's cross-check then...... It's less error-prone and faster. ”

"Really?" Mai Dong blinked, his hazel eyes lit up, and his eyes revealed a little playfulness.

"How long do you have to get over the Ishi Plains?" Tang Yue asked.

"Hmm......" Mai Dong glanced at the time, and then at the trajectory of the space station on the screen, "There are about forty minutes left." ”

"Then you get ready, I'll move the solar panels out." Tang Yue got up and began to put the bright light armor on his body, he buckled and locked the life support system, and turned on the power switch, "The first time you pass over the plain, how many photos can you take?" ”

"It's hard to say...... The system in the Discovery cabin was not originally designed to take pictures of the ground, and it was a bit cumbersome to operate, but fortunately, it supported continuous tracking and photography. Mai Dong estimated slightly, "My effective observation time is about 15 minutes, and I can take two pictures in one second after locking the trajectory." ”

Fifteen minutes, two photos per second, then a total of 1,800 pictures.

"Remember to start scanning and shooting from the Chelomé's landing position." Tang Yue reminded.

"I see."

Tang Yue exhaled a long breath, adjusted the Mingguang armor on his body, and then stood in the hall of Kunlun Station for a few minutes, slightly distracted.

His gaze swept over the empty chair beside the table, looked around, and landed on the floor in front of him.

"I'm out."

"Uh-huh." The girl waved her hand, "Go and go back quickly, stay safe." ”

Tang Yue opened the hatch of the airlock chamber and was about to lean over to get out, when his movements suddenly stopped again, he turned around, and his eyes fell on Mai Dong's body on the screen.

"Thank you, Mai Dong...... I also thank you on behalf of the old cat. ”

"Say thank you to me." The girl smiled, her eyes turned away, a little shy, and pinched the Shiba Inu toy in her hand.

Tang Yue slipped into the airlock, and the hatch closed heavily behind him.