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Property and Equipment
 12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
The following table presents the composition of property and equipment:
December 31,
 
Useful Life
20242023
 (In thousands)
Satellite system17.5 years$3,242,845 $3,242,829 
Ground system5-7 years76,994 70,497 
Equipment3-5 years55,041 51,788 
Internally developed software and purchased software3-7 years369,080 332,824 
Building and leasehold improvements5-39 years39,157 33,433 
 Total depreciable property and equipment
3,783,117 3,731,371 
Less: accumulated depreciation(1,991,387)(1,804,884)
Total depreciable property and equipment, net of accumulated depreciation1,791,730 1,926,487 
Land8,037 8,037 
Construction-in-process:
Spare satellites
181,762 181,557 
Other construction-in-process99,015 79,677 
Total property and equipment, net of accumulated depreciation
$2,080,544 $2,195,758 
 

Other construction-in-process consisted of the following:
December 31,
 20242023
 (In thousands)
Internally developed and purchased software$80,665 $60,467 
Equipment5,948 6,859 
Ground system12,402 12,351 
Total other construction-in-process$99,015 $79,677 
Depreciation expense was $195.9 million, $318.5 million and $301.9 million for the years ended December 31, 2024, 2023 and 2022, respectively. See “Property and Equipment” in Note 2 above for more information with respect to changes in depreciation expense incurred.
Other construction in process
Other construction-in-process consisted of the following:
December 31,
 20242023
 (In thousands)
Internally developed and purchased software$80,665 $60,467 
Equipment5,948 6,859 
Ground system12,402 12,351 
Total other construction-in-process$99,015 $79,677