<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 00:30:00.000"
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, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.03.28 (087) 00:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608703280030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.975" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.689" 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="7.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="384.376" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="364.019" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.284" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="33.185" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.645" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="16.066" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="55.520" 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="103">
<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 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 8.0 8.05 8.1 8.15 8.2 8.25 8.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
465.000 460.000 455.000 450.000 440.000 430.000 425.000 405.000 395.000 385.000 385.351 385.702 386.053 386.404 386.754 387.105 387.456 387.807 388.158 388.509 388.860 389.211 389.561 389.912 390.263 390.614 390.965 391.316 391.667 392.018 392.368 392.719 393.070 393.421 393.772 394.123 394.474 394.825 395.175 395.526 395.877 396.228 396.579 396.930 397.281 397.632 397.982 398.333 398.684 399.035 399.386 399.737 400.088 400.439 400.789 401.140 401.491 401.842 402.193 402.544 402.895 403.246 403.596 403.947 404.298 404.649 405.000 400.000 400.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 417.500 420.000 422.500 425.000 425.000 425.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 0 54 0 57 54 57 60 57 0 51 0 0 0 0 0 0 0 57 54 0 60 0 57 0 0 60 0 0 0 0 0 0 0 0 0 0 54 0 0 0 54 0 54 0 0 0 0 0 0 0 0 54 60 0 0 0 0 51 0 51 0 0 0 0 60 60 0 60 60 57 0 57 63 51 63 0 60 0 0 0 54 0 54 0 0 57 54 54 54 51 57 54 48 54 54 0 48 0 45 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 1.171875 0.390625 -1.171875 1.171875 0.390625 0.390625 -0.390625 0.390625 0.390625 2.734375 0.390625 -0.390625 -0.390625 0.390625 -2.734375 -2.734375 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 -1.953125 0.390625 -1.953125 1.171875 -0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 -1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875 0.390625 1.953125 0.390625 1.171875 1.171875 1.953125 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 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="107">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.493 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.986 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.479 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 384.376 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.316 0.292 0.26 0.216 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.208 0.23 0.251 0.272 0.293 0.314 0.335 0.354 0.359 0.419 0.523 0.675 0.829 0.97 1.104 1.233 1.36 1.487 1.616 1.746 1.881 2.019 2.162 2.311 2.467 2.631 2.803 2.986 3.18 3.387 3.61 3.852 4.114 4.403 4.724 5.083 5.493 5.968 6.53 7.201 7.94 8.3 8.299 8.208 7.995 7.691 7.323 6.912 6.48 6.039 5.602 5.176 4.767 4.379 4.014 3.673 3.355 3.062 2.791 2.542 2.314 2.105 1.914 1.739 1.581 1.436 1.304 1.184 1.075 0.976 0.886 0.804 0.73 0.662 0.601 0.545 0.495 0.449 0.408 0.37 0.336 0.305 0.276 0.251 0.227 0.206

</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="8.3" PeakHeight="384.376" Num="5" zHalfNm="364.019" Error="7.189">
-123.337 -65.874 28.498 0.393 -4.577
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.479" Depth="0.154"/>
<TopsideChapman PeakHeight="384.376" PeakDensity="854714.6" PeakScaleHeight="16.066" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
