remote sensing - 2025 ACF Winter

Question

The A-train is a so-called constellation of objects used in this scientific field. For 10 points each:

[10m] Name this field exemplified by the use of Earth observation satellites. Active instruments in this field emit their own radiation, while their passive counterparts utilize existing radiation, such as sunlight.

ANSWER: remote sensing [or RS]

[10h] Sensors on remote sensing satellites are typically arranged in one of these two configurations. One utilizes a single detector moving back and forth, while the other uses a line of detectors to collect swaths of data. Name either.

ANSWER: whisk broom OR push broom [accept across-track or spotlight in place of “whisk broom”; accept along-track in place of “push broom”]

[10e] The single detector on a whisk broom scanner is able to scan back and forth by using a rotating one of these devices. The James Webb Space Telescope has 18 large, hexagonal, gold-plated devices of this type.

ANSWER: mirrors [accept reflectors or looking glasses]

<Editors, Other Science>

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Summary


California	Main	Y	5	16.00	100%	60%	0%
Canada	Main	Y	1	20.00	100%	100%	0%
Florida	Main	Y	10	12.00	90%	30%	0%
Great Lakes	Main	Y	4	7.50	75%	0%	0%
Lower Mid-Atlantic	Main	Y	7	5.71	57%	0%	0%
Midwest	Main	Y	8	10.00	88%	13%	0%
North	Main	Y	8	10.00	75%	25%	0%
Northeast	Main	Y	5	10.00	100%	0%	0%
Overflow	Main	Y	4	10.00	100%	0%	0%
Pacific Northwest	Main	Y	11	10.91	91%	18%	0%
South Central	Main	Y	4	2.50	25%	0%	0%
Southeast	Main	Y	11	8.18	82%	0%	0%
UK	Main	Y	4	10.00	75%	25%	0%
Upper Mid-Atlantic	Main	Y	8	11.25	100%	13%	0%
Upstate NY	Main	Y	7	7.14	71%	0%	0%
2025 ACF Nationals	2025-08-09	Y	11	10.00	91%	0%	9%
2024 ARCADIA at UC Berkeley	04/19/2025	Y	3	10.00	100%	0%	0%

Data


Stanford B	Berkeley E	10	0	10	20
Berkeley A	Berkeley F	0	0	10	10
Berkeley B	Stanford C	0	0	10	10
Berkeley C	UCSC	10	0	10	20
Stanford A	Berkeley D	10	0	10	20
UCLA A	UCLA D	10	0	10	20
McGill C	McGill B	0	0	10	10
Guelph A	McMaster A	10	0	10	20
McMaster C	Toronto H	0	0	10	10
Queen's A	Carleton	0	0	10	10
Toronto A	Toronto D	10	0	10	20
Ottawa	Toronto B	10	0	10	20
McGill A	Toronto C	0	0	10	10
Toronto F	Toronto J	0	0	10	10
Toronto I	Toronto K	0	0	0	0
Toronto Metropolitan	Toronto G	0	0	10	10
FIU	UCF B	0	0	0	0
UF B	FSU	0	0	10	10
Melbourne A	UF C	0	0	10	10
UCF A	UF D	0	0	10	10
CWRU B	CWRU D	0	0	10	10
CWRU C	Pitt C	0	0	10	10
Kenyon A	MSU A	0	0	0	0
OSU A	CWRU A	0	0	10	10
OSU B	Kenyon B	0	0	0	0
Pitt B	OSU C	0	0	0	0
Pitt A	OSU D	0	0	10	10
North Carolina B	Clemson A	0	0	10	10
North Carolina C	James Madison	0	0	10	10
North Carolina A	Tusculum	10	0	10	20
Virginia Tech A	Tennessee B	0	0	10	10
Virginia A	South Carolina A	0	0	10	10
George Mason A	Notre Dame E	10	0	10	20
Georgetown A	George Washington A	0	0	10	10
Georgetown B	Johns Hopkins A	0	0	10	10
Johns Hopkins C	Johns Hopkins B	0	0	0	0
Maryland C	Maryland A	0	0	10	10
UMBC A	Maryland D	0	0	0	0
NYU A	VCU A	10	0	10	20
NYU B	Penn A	0	0	10	10
South Carolina B	Liberty B	0	0	0	0
Tennessee A	Virginia Tech B	0	0	10	10
Virginia B	Liberty A	0	0	10	10
Swarthmore A	Columbia A	0	0	10	10
Rutgers C	Columbia B	0	0	10	10
Rutgers B	Columbia C	0	0	10	10
Princeton A	Rowan A	0	0	10	10
Vassar A	Lehigh B	0	0	10	10
SIUE	Missouri B	0	0	10	10
Missouri A	William Woods	0	0	10	10
Truman State	WashU D	0	0	10	10
WashU A	WashU C	0	0	10	10
Chicago C	Chicago B	0	0	10	10
Iowa State	Carleton	0	0	0	0
Minnesota B	Macalester B	0	0	0	0
Nebraska	Minnesota A	0	0	10	10
Wisconsin	Macalester A	0	0	0	0
UIC	Illinois A	0	0	0	0
Michigan B	Indiana A	0	0	10	10
Kentucky	Illinois C	0	0	10	10
Michigan C	Indiana B	0	0	10	10
Chicago A	Notre Dame A	0	0	10	10
Notre Dame C	Notre Dame B	0	0	10	10
Louisville A	Notre Dame D	0	0	10	10
Michigan A	Purdue A	10	0	10	20
Purdue B	Michigan D	10	0	10	20
Louisville B	Purdue C	0	0	10	10
Amherst B	BC A	0	0	0	0
BC B	Amherst A	0	0	0	0
BU	MIT A	0	0	10	10
Bowdoin A	Brown C	0	0	10	10
Brandeis Clemenceau	Tufts A	0	0	10	10
Dartmouth	Brandeis Wilson	0	0	10	10
Brown A	Yale A	0	0	10	10
Brown B	Cornell-UG	0	0	10	10
Harvard	Tufts B	0	0	10	10
Williams	Brandeis Lloyd George	0	0	10	10
MIT B	Yale B	0	0	10	10
Alberta	British Columbia C	0	0	0	0
British Columbia D	Simon Fraser	0	0	10	10
British Columbia A	Washington A	10	0	10	20
Washington B	British Columbia B	0	0	10	10
McGill D	Rose State	10	0	10	20
Texas A	Northwestern A	0	0	10	10
Arizona State B	UTD B	0	0	10	10
Arizona State A	Northwestern C	0	0	10	10
Alberta B	Northwestern B	0	0	10	10
Texas B	Tulsa	0	0	10	10
Iowa	UCO	0	0	10	10
Ohio	UTD A	0	0	10	10
Auburn A	Huntsville A	0	0	10	10
Alabama A	Huntsville B	0	0	10	10
Georgia Tech C	Georgia Tech B	0	0	10	10
Vanderbilt A	Mississippi State A	0	0	0	0
UAB A	Georgia Tech A	0	0	0	0
Bruin A	Vanderbilt B	0	0	10	10
Warwick A	Birmingham A	0	0	10	10
Oxford A	Bristol A	0	0	10	10
Bristol B	City St George's A	0	0	10	10
Cambridge B	Oxford B	0	10	0	10
Edinburgh A	Cambridge C	0	0	10	10
Sheffield B	Edinburgh B	0	0	10	10
LSE A	Imperial A	0	0	10	10
Imperial B	Imperial C	0	0	10	10
Sheffield A	Manchester A	0	0	10	10
Manchester B	Cambridge D	0	0	10	10
Cambridge A	Southampton A	0	0	10	10
Cornell-DII	Syracuse	0	0	10	10
RIT A	ESF	0	0	10	10
Rochester	RIT B	0	0	10	10
Georgia Tech D	Auburn B	0	0	10	10