CANOPUS stations are:

BAC = Back

CHU = Fort Churchill

CON = Contwoyto Lake

DAW = Dawson

ESK = Eskimo Point

GIL = Gillam

ISL = Island Lake

MCM = Fort McMurray

PIN = Pinawa

RAB = Rabbit Lake

RAN = Rankin Inle

SIM = Fort Simpson

SMI = Fort Smith

Data Cautions:

• Steps in the GILL Z component for 93.11.03, near 0420 & 1150 UT coincide with similar steps of lower amplitude in the PINA data. This strongly suggests they are manmade, and we recommend that they be ignored.
• The riometers at ISLL, DAWS and FSIM are not functioning.
• Calibrations of the riometers at ESKI, FCHU, BACK, GILL, CONT, MCMU date back to the riometer purchase in 1985/86 and are not to be trusted. In particular MCMU has a weak signal and is operating in a very compressed range; this together with the detailed numbers of the calibration used result in apparantly too large db changes. These sites should be used ONLY as a relative indications of absorption.
• Riometers at RANK, PINA, FSMI, RABB were calibrated in the interval 1990-1993. The relative absorptions indicated should be good within a factor of 2, possibly better. PINA was calibrated 9308 and should be reliable within 20% or so.

Note that the magnetometer data from GILL 93/11/02 04:40-11:50 UT shows numerous disturbances due to Manitoba Hydeo-Electric Company testing of current dump equipment. The principal disturbances at the beginning and end of the interval are easily detected in PINA Z component data, proving they are man-made (T. Hughes)

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