<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 23:10:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2, Trace overlaps while constructing baseline</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" >
2026.03.02 (061) 23:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606103022310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.995" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.915" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="390.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="390.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="415.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.561" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="355.585" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.957" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="43.609" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.252" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="19.670" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="70">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
390.000 390.000 390.000 390.000 393.333 396.667 400.000 403.333 406.667 410.000 400.000 410.000 410.000 410.000 410.000 407.500 405.000 407.500 410.000 412.500 415.000 425.000 427.500 430.000 425.000 420.000 415.000 415.000 415.000 410.000 411.250 412.500 413.750 415.000 415.000 415.000 417.500 420.000 415.000 415.000 415.000 410.000 413.333 416.667 420.000 417.500 415.000 415.667 416.333 417.000 417.667 418.333 419.000 419.667 420.333 421.000 421.667 422.333 423.000 423.667 424.333 425.000 425.000 425.000 420.000 410.000 410.000 411.376 415.000 450.871
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 51 0 0 0 0 0 60 0 57 0 57 57 0 48 48 51 0 63 54 0 54 54 51 54 57 60 54 57 0 0 57 51 54 0 48 54 0 57 51 0 0 54 0 51 0 54 0 0 0 54 57 0 0 0 0 0 0 0 51 51 0 54 57 54 54 57 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -0.390625 -0.390625 -0.390625 1.171875 0.390625 1.171875 -1.171875 -0.390625 -1.171875 1.953125 0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.953125 0.390625 -1.171875 -0.390625 -1.953125 1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 0.390625 -1.171875 0.390625 -1.171875 -0.390625 0.390625 -0.390625 1.171875 0.390625 -0.390625 -2.734375 -1.953125 -1.171875 -0.390625 -1.953125 1.171875 1.953125 0.390625 -0.390625 1.953125 1.171875 1.953125 1.953125 -1.953125 -0.390625 -1.953125 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="113">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.118 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.235 180.0 185.0 190.0 195.0 200.0 205.0 210.0 212.353 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.561 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.31 0.282 0.243 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.231 0.253 0.276 0.298 0.321 0.343 0.354 0.381 0.449 0.544 0.667 0.804 0.943 1.08 1.215 1.348 1.481 1.614 1.748 1.883 2.02 2.16 2.302 2.447 2.596 2.75 2.908 3.071 3.24 3.416 3.599 3.791 3.992 4.205 4.431 4.673 4.934 5.221 5.544 5.92 6.397 6.65 6.64 6.565 6.425 6.236 6.008 5.752 5.479 5.195 4.907 4.619 4.336 4.061 3.796 3.541 3.299 3.07 2.853 2.65 2.458 2.28 2.112 1.957 1.812 1.677 1.551 1.435 1.327 1.227 1.135 1.049 0.969 0.896 0.828 0.765 0.707 0.653 0.603 0.557 0.515 0.476 0.439 0.406 0.375 0.346 0.32 0.295 0.273 0.252 0.233 0.215

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.65" PeakHeight="382.561" Num="5" zHalfNm="355.585" Error="3.724">
-131.024 -67.201 39.206 -10.912 -0.277
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="102.353" Depth="0.154"/>
<TopsideChapman PeakHeight="382.561" PeakDensity="548666.25" PeakScaleHeight="19.67" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
