The Martian

Once the battery runs down, the electronics get too cold to operate, and the whole system dies. The solar panels will recharge the battery somewhat, but there’s nothing to tell the system to reboot. Anything that could make that decision would be electronics, which would not be working. Eventually, the now unused battery will lose its ability to retain charge.

That’s the usual cause of death. And I sure hope it’s what killed Pathfinder.

I piled some leftover parts of the MDV into a makeshift table and ramp. Then I dragged the Lander up to my new outdoor workbench. Working in an EVA suit is annoying enough. Bending over the whole time would have been torture.

I got my toolkit and started poking around. Opening the outer panel wasn’t too hard and I identified the battery easily enough. JPL labels everything. It’s a 40 Amp-hour Ag-Zr battery with an optimal voltage of 1.5V. Wow. They really made those things run on nothin’ back then.

I detached the battery and headed back inside. I checked it with my electronics kit, and sure enough it’s dead, dead, dead. I could shuffle across a carpet and hold more charge.

So I knew what it needed. 1.5 volts.

Compared to the makeshift crap I’ve been gluing together since Sol 6, this was a breeze. I have voltage controllers in my kit! It only took me 15 minutes to put a controller on a reserve power line, then another hour to go outside and run the line to where the battery used to be.

Then there’s the issue of heat. It’s a good idea to keep electronics above -40C. The temperature today is a brisk -63C.

The battery was big and easy to identify, but I had no clue where the heaters were. Even if I knew, it’d be too risky to hook them directly to power. I could easily fry the whole system.

So instead, I went to good old “Spare Parts” Rover 1, and stole it’s environment heater. I’ve gutted that poor rover so much, it looks like I parked it in a bad part of town.

Bringing the heater to my “workbench,” I hooked it to Hab power. Then I rested it in the Lander where the battery used to be.

Now I wait. And hope.

LOG ENTRY: SOL 96

I was really hoping I’d wake up to a functional Lander, but no such luck. Its high-gain antenna is right where I last saw it. Why does that matter? Well, I’ll tell ya…

If the Lander comes back to life (and that’s a big if) it’ll try to establish contact with Earth. Problem is, nobody’s listening. It’s not like the Pathfinder team is hanging around JPL just in case their long dead probe is repaired by a wayward astronaut.

The Deep Space Network and SETI are my best bets for picking up the signal. If either of them caught a blip from Pathfinder, they’d tell JPL.

JPL would quickly figure out what was going on, especially when they triangulated the signal to my landing site.

They’d tell the Lander where Earth is, and it would angle the high-gain antenna appropriately. That there, the angling of the antenna, is how I’ll know if it linked up.

So far, no action.

There’s still hope. Any number of reasons could be delaying things. The rover heater is designed to heat air at 1 atmosphere. The thin Martian air severely hampers its ability to work. So the electronics might need more time to warm up.

Also, Earth is only visible during the day. I (hopefully) fixed the Lander yesterday evening. It’s morning now, so most of the intervening time has been night. No Earth.

Sojourner’s also showing no signs of life. It’s been in the nice, warm environment of the Hab all night, with plenty of light on its sparkling clean solar cells. Maybe it’s running an extended self-check, or staying still until it hears from the Lander or something.

I’ll just have to put it out of my mind for now.

PATHFINDER LOG: SOL 0

BOOT SEQUENCE INITIATED

TIME 00:00:00

LOSS OF POWER DETECTED, TIME/DATE UNRELIABLE

LOADING OS…

VXWARE OPERATING SYSTEM © WIND RIVER SYSTEMS

PERFORMING HARDWARE CHECK:

INT. TEMPERATURE: -34C

EXT. TEMPERATURE: NONFUNCTIONAL

BATTERY: FULL

HIGAIN: OK

LOGAIN: OK

WIND SENSOR: NONFUNCTIONAL

METEOROLOGY: NONFUNCTIONAL

ASI: NONFUNCTIONAL

IMAGER: OK

ROVER RAMP: NONFUNCTIONAL

SOLAR A: NONFUNCTIONAL

SOLAR B: NONFUNCTIONAL

SOLAR C: NONFUNCTIONAL

HARDWARE CHECK COMPLETE

BROADCASTING STATUS

LISTENING FOR TELEMETRY SIGNAL…

LISTENING FOR TELEMETRY SIGNAL…

LISTENING FOR TELEMETRY SIGNAL…

SIGNAL ACQUIRED

Chapter 11

“Something’s coming in… yes… yes! It’s Pathfinder!”

The room burst in to applause and cheers. Venkat slapped an unknown technician heartily on the back while Bruce pumped his fist in the air.

The ad-hoc control center was an accomplishment in itself. JPL had just 20 days to piece together antiquated computers, repair broken components, network everything, and install hastily made software to interact with the modern Deep Space Network. A team of engineers had worked around the clock, finishing only two days earlier.

The room itself was formerly a conference room; JPL had no space ready for the sudden need. Crammed with computers and equipment, little space was left over for the many spectators squeezing in.