<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 18:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: One of F2 cusps was derived from the other, 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" >
2026.03.22 (081) 18:50:00</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">
FF202608103221850009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.622" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.333" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.802" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="364.930" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.700" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.583" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="129.084" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.214" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.286" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="158">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 250.000 250.000 255.000 255.000 255.000 260.000 262.500 265.000 267.500 270.000 272.500 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 286.667 288.333 290.000 295.000 297.500 300.000 301.667 303.333 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 312.500 315.000 315.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 325.000 330.000 331.250 332.500 333.750 335.000 336.667 338.333 340.000 341.667 343.333 345.000 345.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 362.500 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 378.333 381.667 385.000 385.000 385.000 385.000 390.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 417.500 420.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 430.000 433.333 436.667 440.000 440.000 445.000 447.500 450.000 450.000 450.000 455.000 460.000 465.000 465.000 470.000 470.000 470.000 480.000 482.500 485.000 489.737 495.001 500.886 507.508 515.016 523.600 533.509 545.075 558.752 575.177 595.268 620.408
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 54 57 0 51 57 57 57 0 54 0 0 0 45 54 45 0 0 0 0 57 51 0 66 63 0 0 63 69 0 0 0 0 66 0 54 0 69 72 0 0 72 69 60 0 72 72 69 0 72 0 0 0 72 75 72 0 0 0 66 0 0 66 0 0 57 57 60 57 0 57 60 66 69 0 63 72 75 66 72 78 66 72 75 75 66 69 72 69 0 0 54 63 66 63 54 0 63 0 57 60 0 60 60 60 60 51 54 54 54 54 54 60 63 66 66 69 57 63 63 48 63 0 0 45 54 57 0 0 48 54 48 0 45 51 51 51 0 45 54 54 57 45 54 0 51 48 51 51 51 48 0 54 54 0 45 0 42
</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 -1.171875 -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 -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 -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 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 -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 1.953125 -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 -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 -1.953125 0.390625 -1.953125 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.581 90.0 95.0 100.0 105.0 110.0 114.123 115.0 118.246 120.0 122.369 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 364.93 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.883 2.426 2.711 2.802 2.68 2.68 2.68 2.732 2.802 2.878 3.02 3.161 3.302 3.445 3.59 3.738 3.889 4.044 4.203 4.367 4.536 4.71 4.889 5.073 5.263 5.458 5.659 5.865 6.076 6.293 6.514 6.74 6.97 7.203 7.441 7.681 7.924 8.169 8.415 8.663 8.911 9.159 9.406 9.651 9.894 10.132 10.366 10.593 10.811 11.019 11.214 11.392 11.552 11.69 11.801 11.883 11.933 11.95 11.95 11.944 11.927 11.899 11.861 11.813 11.756 11.69 11.617 11.536 11.448 11.353 11.252 11.146 11.035 10.919 10.798 10.674 10.547 10.416 10.283 10.147 10.009 9.869 9.728 9.585 9.442 9.298 9.153 9.008 8.863 8.718 8.573 8.428 8.284 8.141 7.999 7.857 7.717 7.578 7.439 7.303 7.167 7.033 6.901 6.77 6.64 6.513 6.387 6.262 6.14 6.019 5.9 5.783 5.667 5.553 5.442 5.332 5.223 5.117 5.012 4.91 4.809 4.709 4.612 4.516 4.422 4.33 4.239 4.151 4.063 3.978 3.894 3.812 3.731 3.652 3.575 3.499 3.424 3.351 3.28 3.209 3.141 3.073 3.008 2.943 2.88 2.818 2.757 2.698 2.639 2.582 2.527 2.472 2.418 2.366 2.315 2.265 2.215 2.167 2.12 2.074 2.029 1.985 1.942 1.899 1.858 1.817 1.778 1.739 1.701 1.664 1.628 1.592 1.557 1.523 1.49 1.457 1.426 1.394 1.364 1.334 1.305 1.276 1.248 1.221 1.194 1.168

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.802" PeakHeight="110.0" Num="3" Error="0.0">
-30.02 12.448 -2.847
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.802" EndFrequency="11.95" PeakHeight="364.93" Num="5" zHalfNm="270.7" Error="2.821">
-208.692 -40.458 7.016 -1.426 0.999
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.369" Depth="0.122"/>
<TopsideChapman PeakHeight="364.93" PeakDensity="1771743.1" PeakScaleHeight="70.286" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
