猫鼬按指定间隔查询获取数据

Question

我有以下文档的mongodb集合：

{

    "_id" : ObjectId("5ba605ebf57bd40fb4900f76"),
    "__v" : 0.0,
    "Timestamp" : 20180823095157.0,
    "Speed" : 3.0,
    "Altitude" : 0.0,
    "Latitude" : 23.19364,
    "Longitude" : 72.638502,
    "battery" : 90.0,
    "VehicleId" : "ISG503"
}

{

    "_id" : ObjectId("5ba605ebf57bd40fb4900f77"),
    "__v" : 0.0,
    "Timestamp" : 20180823095158.0,
    "Speed" : 3.0,
    "Altitude" : 0.0,
    "Latitude" : 23.193662,
    "Longitude" : 72.63849,
    "battery" : 89.0,
    "VehicleId" : "ISG503"
}

{

    "_id" : ObjectId("5ba605ebf57bd40fb4900f78"),
    "__v" : 0.0,
    "Timestamp" : 20180823095159.0,
    "Speed" : 3.0,
    "Altitude" : 0.0,
    "Latitude" : 23.193668,
    "Longitude" : 72.638493,
    "battery" : 90.0,
    "VehicleId" : "ISG503"
}

此处的时间戳为YYYYMMDDhhmmss格式。

我每秒钟都有数据，但我只想在猫鼬查询中每隔15秒获取一次数据。