The astronomical theory and data compared - Ice Ages and Interglacials: Measurements, Interpretation, and Models - page 279

Figure 10.2. The variation of solar input to 65 N over the past 800,000 years.
Figure 10.3. Comparison of Antarctic ice core data with calculated solar input at 65 N over
800,000 years: (upper panel) Antarctic data; (lower panel) solar input to 65 N.