<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-05 -095 08:10:00.000"
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 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 08:10:00</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">
FF202609504050810009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.861" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.795" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="4.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="256.650" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.368" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="229.995" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="206.814" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.125" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="33.000" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.718" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="17.563" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="29.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.080" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 212.000 214.000 216.000 218.000 220.000 220.000 220.000 220.000 220.000 220.000 222.500 225.000 230.000 231.667 233.333 235.000 236.667 238.333 240.000 240.000 240.000 240.000 235.000 240.000 245.000 245.000 250.000 250.000 252.690 256.650 263.053 275.172 306.832
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 72 60 75 0 0 78 0 66 63 0 0 75 48 69 75 0 0 75 75 0 78 60 0 0 0 0 51 54 48 72 72 0 0 63 57 54 66 66 75 75 78 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.953125 -0.390625 -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 -0.390625 -0.390625 -0.390625 -0.390625 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="72">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.209 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.333 135.0 140.0 145.0 150.0 155.0 156.667 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 229.995 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.243 0.319 0.356 0.368 0.362 0.345 0.313 0.263 0.212 0.212 0.212 0.212 0.212 0.212 0.212 0.234 0.268 0.301 0.335 0.368 0.607 0.935 1.441 2.141 2.85 3.423 3.844 4.13 4.296 4.35 4.35 4.318 4.229 4.096 3.931 3.743 3.541 3.332 3.12 2.911 2.708 2.511 2.324 2.147 1.98 1.824 1.678 1.542 1.417 1.3 1.193 1.094 1.003 0.919 0.842 0.771 0.706 0.647 0.592 0.542 0.496 0.454 0.415 0.38 0.348 0.318 0.291 0.267 0.244 0.223 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.368" PeakHeight="110.0" Num="3" Error="0.0">
-19.272 2.645 -0.164
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.368" EndFrequency="4.35" PeakHeight="229.995" Num="5" zHalfNm="206.814" Error="1.088">
-55.939 9.058 -4.279 1.13 0.035
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.0" Depth="0.156"/>
<TopsideChapman PeakHeight="229.995" PeakDensity="234770.47" PeakScaleHeight="17.563" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
