<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-04 -094 21:50:00.000"
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 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" >
2026.04.04 (094) 21:50:00</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">
FF202609404042150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.693" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.682" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.843" 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="0.365" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="417.212" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="376.671" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.405" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="61.228" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.242" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.399" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="73.540" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.0 2.05 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 8.0 8.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 380.000 380.000 380.000 385.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.625 376.250 376.875 377.500 378.125 378.750 379.375 380.000 380.000 380.000 382.222 384.444 386.667 388.889 391.111 393.333 395.556 397.778 400.000 400.000 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 400.000 410.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 410.000 412.500 415.000 415.000 415.000 415.000 417.500 420.000 420.000 420.000 420.000 430.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 432.500 435.000 435.000 435.000 435.000 437.500 440.000 440.000 440.000 442.500 445.000 445.000 445.000 447.500 450.000 450.000 450.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 457.500 460.000 462.500 465.000 466.566 468.472 470.843 473.873 477.879 483.425 491.610 504.905 530.267
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 57 54 54 0 57 54 0 0 0 57 60 60 0 0 63 0 0 0 60 60 57 0 60 0 0 0 0 66 0 63 69 0 54 69 66 63 63 63 69 66 69 69 75 57 0 63 63 69 63 69 72 72 75 0 75 78 75 72 63 66 69 72 75 0 75 78 78 78 78 78 81 81 75 75 78 75 66 75 72 66 75 75 60 66 69 72 69 63 69 0 75 60 69 54 78 60 66 0 72 60 60 72 69 0 0 66 66 63 69 63 69 72 69 69 69 0 0 48 51 48
</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 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -2.734375 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -2.734375 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -2.734375 -2.734375 1.953125 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="154">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.265 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.849 140.0 145.0 150.0 155.0 160.0 165.0 169.698 170.0 175.0 180.0 185.0 190.0 195.0 199.547 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 417.212 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 0.316 0.353 0.365 0.361 0.35 0.331 0.302 0.26 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.229 0.257 0.285 0.312 0.34 0.365 0.37 0.435 0.505 0.578 0.652 0.728 0.804 0.882 0.961 1.043 1.126 1.213 1.302 1.395 1.491 1.592 1.697 1.806 1.921 2.042 2.17 2.304 2.447 2.598 2.758 2.93 3.113 3.309 3.52 3.748 3.994 4.261 4.55 4.863 5.202 5.566 5.951 6.351 6.752 7.135 7.476 7.752 7.944 8.04 8.05 8.044 8.004 7.931 7.828 7.7 7.55 7.382 7.199 7.004 6.8 6.589 6.374 6.156 5.938 5.719 5.502 5.288 5.078 4.871 4.669 4.473 4.282 4.097 3.917 3.744 3.577 3.416 3.261 3.112 2.97 2.832 2.701 2.575 2.455 2.34 2.229 2.124 2.023 1.927 1.836 1.748 1.665 1.585 1.509 1.437 1.368 1.302 1.239 1.18 1.123 1.069 1.017 0.968 0.921 0.877 0.834 0.794 0.756 0.719 0.684 0.651 0.62 0.59 0.561 0.534 0.508 0.483 0.46 0.438 0.416 0.396 0.377 0.359 0.341 0.325 0.309 0.294 0.28 0.266 0.253 0.241 0.229 0.218 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.365" PeakHeight="110.0" Num="3" Error="0.0">
-19.174 2.598 -0.159
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.365" EndFrequency="8.05" PeakHeight="417.212" Num="5" zHalfNm="376.671" Error="2.951">
-175.594 -59.689 14.55 5.813 -2.745
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="89.547" Depth="0.165"/>
<TopsideChapman PeakHeight="417.212" PeakDensity="804001.25" PeakScaleHeight="31.399" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
