<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 10:50:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.15 (074) 10:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607403151050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.179" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.107" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.660" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="110.640" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.863" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.654" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="355.000" 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="2.605" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="279.422" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.172" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.933" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="78.549" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.592" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="44.101" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="85.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.830" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="132">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 230.000 232.500 235.000 236.667 238.333 240.000 241.667 243.333 245.000 240.000 240.000 241.667 243.333 245.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 266.667 268.333 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 275.000 275.000 275.000 280.000 280.000 275.000 275.000 277.000 279.000 281.000 283.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 355.000 355.000 355.000 360.000 364.696 370.531 377.976 387.804 401.380 421.349 453.619
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 54 0 45 0 0 0 0 0 51 0 51 0 0 60 57 60 0 57 57 60 60 57 0 0 54 57 60 60 63 60 54 0 0 60 63 63 60 63 66 63 0 0 0 57 0 63 63 60 0 57 54 0 66 63 63 63 60 60 63 51 0 0 0 0 69 69 72 69 69 69 69 72 72 72 72 72 69 72 72 75 0 69 69 75 72 75 75 72 72 72 69 72 72 0 72 75 69 66 66 72 57 63 69 69 72 72 69 69 72 69 72 72 69 69 60 66 69 69 69 66 60 66 66 63 63 66 63 63 60 60 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 0.390625 2.734375 0.390625 0.390625 0.390625 2.734375 -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 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 -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 -0.390625 2.734375 -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 -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 -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 -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 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.5 2.55 2.6 2.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.640 112.899 115.604 119.003
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 54 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="168">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 100.0 100.863 105.0 105.928 110.0 110.993 115.0 116.058 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 279.422 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.222 2.651 2.66 2.576 2.534 2.534 2.534 2.634 2.66 2.776 2.913 3.045 3.177 3.309 3.445 3.585 3.731 3.885 4.047 4.22 4.406 4.607 4.824 5.061 5.32 5.603 5.912 6.246 6.603 6.976 7.359 7.742 8.118 8.478 8.818 9.13 9.409 9.65 9.845 9.989 10.075 10.1 10.1 10.085 10.046 9.986 9.907 9.809 9.696 9.568 9.428 9.276 9.116 8.946 8.77 8.589 8.402 8.213 8.02 7.826 7.631 7.435 7.24 7.046 6.853 6.662 6.473 6.286 6.102 5.922 5.744 5.57 5.4 5.233 5.07 4.911 4.755 4.604 4.456 4.312 4.173 4.037 3.904 3.776 3.651 3.53 3.413 3.299 3.189 3.082 2.978 2.878 2.78 2.686 2.595 2.507 2.422 2.339 2.259 2.182 2.107 2.035 1.965 1.898 1.832 1.769 1.708 1.65 1.593 1.538 1.485 1.433 1.384 1.336 1.29 1.245 1.202 1.16 1.12 1.081 1.044 1.008 0.973 0.939 0.906 0.875 0.845 0.815 0.787 0.76 0.733 0.708 0.683 0.659 0.636 0.614 0.593 0.572 0.552 0.533 0.515 0.497 0.48 0.463 0.447 0.431 0.416 0.402 0.388 0.374 0.361 0.349 0.337 0.325 0.314 0.303 0.292 0.282 0.272 0.263 0.253 0.245 0.236 0.228 0.22 0.212 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.66" PeakHeight="100.863" Num="3" Error="3.088">
-15.918 6.525 -1.47
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.66" EndFrequency="10.1" PeakHeight="279.422" Num="5" zHalfNm="222.172" Error="2.243">
-129.882 -30.872 -5.086 0.722 1.754
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.195" Depth="0.126"/>
<TopsideChapman PeakHeight="279.422" PeakDensity="1265632.8" PeakScaleHeight="44.101" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
