instruction: I want to read The Martian - Andy Weir pdf file, so view The Martian - Andy Weir pdf file in the PDF Extra app.

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      content_description: "Chapter 1\r\nLOG ENTRY: SOL 6\r\nI’m pretty much fucked.\r\nThat’s my considered opinion.\r\nFucked.\r\nSix days in to what should be a greatest two months of my life, and\r\nit’s turned in to a nightmare.\r\nI don’t even know who’ll read this. I guess someone will find it\r\neventually. Maybe a hundred years from now.\r\nFor the record… I didn’t die on Sol 6. Certainly the rest of the crew\r\nthought I did, and I can’t blame them. Maybe there’ll be a day of national\r\nmourning for me, and my Wikipedia page will say “Mark Watney is the\r\nonly human being to have died on Mars.”\r\nAnd it’ll be right, probably. Cause I’ll surely die here. Just not on Sol\r\n6 when everyone thinks I did.\r\nLet’s see… where do I begin?\r\nThe Ares program. Mankind reaching out to Mars to send people to\r\nanother planet for the very first time and expand the horizons of\r\nhumanity blah, blah, blah. The Ares 1 crew did their thing and came back\r\nheroes. They got the parades and fame and love of the world.\r\nAres 2 did the same thing, in a different location on Mars. They got a\r\nfirm handshake and a hot cup of coffee when they got home.\r\nAres 3. Well. That was my mission. Well, not mine per se.\r\nCommander Lewis was in charge. I was just one of her crew. Actually, I\r\nwas the very lowest ranked member of the crew. I would only be “in\r\ncommand” of the mission if I were the only remaining person.\r\nWhat do you know? I’m in command.\r\nI wonder if this log will be recovered before the rest of the crew die of\r\nold age? I presume they got back to Earth all right. Well, guys, if you’re\r\nreading this: It wasn’t your fault. You did what you had to do. In your\r\nposition I would have done the same thing. I don’t blame you, and I’m\r\n"
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      content_description: "glad you survived.\r\nI guess I should explain how Mars missions work, for any layman\r\nwho may be reading this. We got to earth orbit the normal way, through\r\nan ordinary ship to Hermes. All the Ares missions use Hermes to get to\r\nand from Mars. It’s really big and cost a lot so NASA only built one.\r\nOnce we got to Hermes, four additional unmanned missions brought\r\nus fuel and supplies while we prepared for our trip. Once everything was\r\na go, we set out for Mars. But not very fast. Gone are the days of heavy\r\nchemical fuel burns and trans-Mars injection orbits.\r\nHermes is powered by ion engines. They throw Argon out the back of\r\nthe ship really fast to get a tiny amount of acceleration. The thing is, it\r\ndoesn\'t take much reactant mass, so a little Argon (and a nuclear reactor\r\nto power things) let us accelerate constantly the whole way there. You\'d\r\nbe amazed at how fast you can get going with a tiny acceleration over a\r\nlong time.\r\nI could regale you with tales of how we had great fun on the trip, but I\r\nwon’t. We did have fun, but I don’t feel like reliving it right now. Suffice\r\nit to say we got to Mars 124 days later without strangling each other.\r\nFrom there, we took the MDV (Mars Descent Vehicle) to the surface.\r\nThe MDV is basically a big can with some light thrusters and parachutes\r\nattached. Its sole purpose is to get six humans from Mars orbit to the\r\nsurface without killing any of them.\r\nAnd now we come to the real trick of Mars exploration: Having all\r\nour shit there in advance.\r\nA total of 14 unmanned missions deposited everything we would need\r\nfor surface operations. They tried their best to land all the supply vessels\r\nin the same general area, and did a reasonably good job. Supplies aren’t\r\nnearly so fragile as humans and can hit the ground really hard. But they\r\ntended to bounce around a lot.\r\nNaturally, they didn’t send us to Mars until they’d confirmed all the\r\nsupplies had made it to the surface and their containers weren’t breached.\r\nStart to finish, including supply missions, a Mars mission takes about 3\r\nyears. In fact, there were Ares 3 supplies en route to Mars while the Ares\r\n"
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      content_description: "2 crew were on their way home.\r\nThe most important piece of the advance supplies, of course, was the\r\nMAV. The “Mars Ascent Vehicle.” That was how we would get back to\r\nHermes after surface operations were complete. The MAV was soft-\r\nlanded (as opposed to the balloon bounce-fest the other supplies had). Of\r\ncourse, it was in constant communication with Houston, and if there were\r\nany problems with it, we would pass by Mars and go back to Earth\r\nwithout ever landing.\r\nThe MAV is pretty cool. Turns out, through a neat set of chemical\r\nreactions with the Martian atmosphere, for every kilogram of hydrogen\r\nyou bring to Mars, you can make 13 kilograms of fuel. It’s a slow\r\nprocess, though. It takes 24 months to fill the tank. That’s why they sent\r\nit long before we got here.\r\nYou can imagine how disappointed I was when I discovered the MAV\r\nwas gone.\r\nIt was a ridiculous sequence of events that led to me almost dying.\r\nThen an even more ridiculous sequence that led to me surviving.\r\nThe mission is designed to handle sandstorm gusts up to 150 km/hr.\r\nSo Houston got understandably nervous when we got whacked with 175\r\nkm/hr winds. We all got in our suits and huddled in the middle of the\r\nHab, just in case it lost pressure. But the Hab wasn’t the problem.\r\nThe MAV is a spaceship. It has a lot of delicate parts. It can put up\r\nwith storms to a certain extent but it can’t just get sandblasted forever.\r\nAfter an hour and a half of sustained wind, NASA gave the order to abort.\r\nNobody wanted to stop a month-long mission after only six days but if\r\nthe MAV took any more punishment we’d all get stranded down here.\r\nWe had to go out in the storm to get from the Hab to the MAV. That\r\nwas going to be risky, but what choice did we have?\r\nEveryone made it but me.\r\nOur main communications dish, which relayed signals from the Hab\r\nto Hermes, acted like a parachute, getting torn from its foundation and\r\ncarried with the torrent. Along the way, it crashed through the reception\r\nantenna array. Then one of those long thin antennae slammed in to me\r\n"
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      content_description: "end first. It tore through my suit like a bullet through butter and I felt the\r\nworst pain of my life as it ripped open my side. I vaguely remember\r\nsuddenly having the wind knocked out of me (pulled out of me, really)\r\nand my ears popping painfully as the pressure of my suit escaped.\r\nThe last thing I remember was seeing Johanssen hopelessly reaching\r\nout toward me.\r\nI awoke to the oxygen alarm in my suit. A steady, obnoxious beeping\r\nthat eventually roused me from a deep and profound desire to just fucking\r\ndie.\r\nThe storm had abated; I was face down, almost totally buried in sand.\r\nAs I groggily came to, I wondered why I wasn’t more dead.\r\nThe antenna had enough force to punch through the suit and my side,\r\nbut then it got stopped by my pelvis. So there was only one hole in the\r\nsuit (and a hole in me, of course).\r\nI had been knocked back quite a ways and rolled down a steep hill.\r\nSomehow I landed face down, which forced the antenna to a strongly\r\noblique angle that put a lot of torque on the hole in the suit. It made a\r\nweak seal.\r\nThen, the copious blood from my wound trickled down toward the\r\nhole. As the blood reached the site of the breach, the water in it quickly\r\nevaporated from the airflow and low pressure, leaving only a gunky\r\nresidue behind. More blood came in behind it and was also reduced to\r\ngunk. Eventually, the blood sealed the gaps around the hole and reduced\r\nthe leak to something the suit could counteract.\r\nThe suit did its job admirably. Seeing the drop in pressure, it\r\nconstantly flooded itself with air from my nitrogen tank to equalize. Once\r\nthe leak became manageable, it only had to trickle new air in slowly the\r\nrelieve the air lost.\r\nAfter a while, the CO2 (carbon dioxide) absorbers in the suit were\r\nexpended. That’s really the limiting factor to life support. Not the\r\namount of oxygen you bring with you, but the amount of CO2 you can\r\nremove. In the Hab, we had the Oxygenator, a large piece of equipment\r\nthat could break CO2 apart and give the oxygen back. But the spacesuits\r\n"
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