— Geoff Evatt | 26 Dec 2019
Hello from Outer Recovery, where we are spending Boxing Day cooped up in our tents as the weather outside is not so great today…. meaning I have the chance to give a status update.
All of a mixed bag really. The positive news is that we have begun searching for the lost meteorites! And when searching, the system is performing rather well (we can see our trial targets down to almost 20cm in real time, with minimal false positives). The bad news is the combination of vibrations, cold, and extended periods of operation are battering the system, meaning we are spending most of the time patching it up.
To give an example, yesterday we found the main power cable from the solar panels to the batteries had snapped clean through, in two places. This cable was Antarctic rated and successfully used in other projects. But the high pitch vibrations being put through the system by the scalloped ice surface, means that even the tiniest of weaknesses are soon exploited. And this particular one has consequences: as it snapped it caused the solar panel regulator to be permanently damaged, meaning we can no longer use the solar panels to charge the batteries, so we have to rely on a generator, which in turn means it takes much longer to charge the system…. and that’s after several hours of trying to identify and fix the problem…. This example shows what we ‘re up against. And with the whole search being a numbers game (for this particular ice field, we have predicted 3-4 subsurface iron meteorites) then, we have to search a large area to stand even a slight chance of finding one. But we are progressing, albeit haltingly.
In other news the surface search is moving forwards well, with over 30 meteorites collected so far. From their appearance we seem to have collected a good diversity of samples, which is welcome news. We had predicted around a hundred meteorites on the surface for this icefield (give or take), and as that includes the 15 found by Katie here last year, then we are moving steadily towards that estimate. And that’s not taking into account that the blue ice area has over a 20% snow covering, meaning over a fifth of the predicted meteorites are out of view.
We also managed to ascend the ridge overlooking our camp yesterday, to find a stunning view down over the blue ice plains below, with (surprise!) yet more Antarctic plateau behind. It was a great way to round off Christmas Day, before heading back to a lovely smorgasbord of food and cake.
In the meantime we’re sitting out the bad weather, and about to commence with yet more repairs on the system….