<?xml version="1.0"?>
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<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-05 -095 01:50:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 8 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.05 (095) 01:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202609504050150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="17" >
<URSI ID="00" Val="7.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.114" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.753" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="306.667" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.590" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 292.500 290.000 285.000 285.000 285.000 280.000 275.000 270.000 270.000 267.273 264.545 261.818 259.091 256.364 253.636 250.909 248.182 245.455 242.727 240.000 245.000 250.000 252.500 255.000 260.000 265.000 267.500 270.000 270.000 275.000 275.000 280.000 283.000 286.000 289.000 292.000 295.000 298.000 301.000 304.000 307.000 310.000 313.000 316.000 319.000 322.000 325.000 328.000 331.000 334.000 337.000 340.000 343.000 346.000 349.000 352.000 355.000 350.000 352.500 355.000 350.000 365.000 345.000 330.000 343.333 356.667 370.000 367.045 364.091 361.136 358.182 355.227 352.273 349.318 346.364 343.409 340.455 337.500 334.545 331.591 328.636 325.682 322.727 319.773 316.818 313.864 310.909 307.955 305.000 305.000 305.000 305.000 300.000 303.333 306.667 310.000 317.500 325.000 325.000 331.667 338.333 345.000 350.000 350.000 350.000 350.000 357.500 365.000 368.333 371.667 375.000 380.000 400.000 410.000 415.000 441.328 488.861
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 54 60 0 57 60 0 69 0 0 63 0 0 66 0 60 72 0 0 51 0 57 0 75 0 54 69 60 60 69 60 60 0 0 57 0 0 0 51 0 0 0 57 0 0 0 0 60 0 54 0 0 0 0 0 0 48 57 0 51 54 51 54 57 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 48 0 63 0 69 69 66 0 66 66 57 0 0 57 60 60 60 51 0 54 54 0 0 54 0 51 0 0 48 45 51 48 48 48 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 0.390625 0.390625 -1.953125 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.171875 0.390625 1.171875 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 1.171875 -0.390625 0.390625 1.171875 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875 1.171875 1.171875 0.390625 -0.390625 -0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 -0.390625 2.734375 1.953125 -1.171875 -0.390625 1.953125 0.390625 1.171875 1.171875 1.953125 1.953125 1.171875 -0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 -0.390625 -0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.953125 0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 -0.390625 0.390625 -0.390625 0.390625 0.390625 -1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
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