<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-24 -083 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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.03.24 (083) 21:50:00</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">
FF202608303242150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.606" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.539" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="502.285" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.392" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="411.584" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="353.595" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.938" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.142" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.671" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.080" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="89.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.670" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="179">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 321.250 322.500 323.750 325.000 320.000 322.500 325.000 320.000 320.682 321.364 322.045 322.727 323.409 324.091 324.773 325.455 326.136 326.818 327.500 328.182 328.864 329.545 330.227 330.909 331.591 332.273 332.955 333.636 334.318 335.000 335.000 335.000 335.000 335.000 335.000 337.000 339.000 341.000 343.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 355.000 353.333 351.667 350.000 355.000 356.667 358.333 360.000 360.000 360.000 355.000 355.000 357.500 360.000 360.000 360.000 360.000 361.667 363.333 365.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 375.000 380.000 380.000 381.000 382.000 383.000 384.000 385.000 386.000 387.000 388.000 389.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 396.667 398.333 400.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 440.000 445.000 445.000 445.000 450.000 450.000 450.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 465.000 460.000 475.000 472.500 470.000 472.500 475.000 485.000 485.000 490.000 491.178 492.492 493.969 495.639 497.543 499.735 502.285 505.289 508.878 513.245 518.671 525.594 534.735 547.361
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 0 0 57 60 0 57 54 0 0 63 0 63 0 0 0 60 0 0 0 0 0 0 0 0 0 0 0 0 66 0 66 63 66 57 0 0 0 0 0 48 66 0 0 0 0 63 0 0 60 66 54 0 0 66 63 0 0 54 60 60 63 69 0 69 0 0 63 0 0 69 0 0 69 63 66 0 69 60 69 63 66 48 69 72 60 63 48 72 0 60 0 0 0 48 0 60 0 69 69 72 69 69 69 0 0 63 72 75 78 75 69 72 75 66 66 0 75 63 69 72 75 75 72 72 57 63 69 72 72 66 69 72 66 69 60 60 66 69 60 63 63 57 63 66 60 63 66 60 66 63 60 54 0 45 54 54 57 54 54 57 60 54 54 51 48 51 48 51 48 48 48 42 48 45 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.795 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.428 140.0 145.0 150.0 155.0 160.0 165.0 168.856 170.0 175.0 180.0 185.0 190.0 195.0 198.284 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 411.584 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.259 0.34 0.38 0.392 0.388 0.375 0.352 0.318 0.267 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.24 0.273 0.305 0.338 0.371 0.392 0.428 0.514 0.594 0.675 0.762 0.855 0.957 1.069 1.194 1.332 1.486 1.657 1.845 2.051 2.275 2.517 2.775 3.048 3.336 3.636 3.947 4.268 4.598 4.936 5.282 5.634 5.992 6.356 6.724 7.097 7.472 7.849 8.225 8.6 8.969 9.329 9.674 9.998 10.291 10.544 10.745 10.882 10.946 10.95 10.943 10.911 10.853 10.772 10.671 10.55 10.413 10.261 10.095 9.919 9.733 9.539 9.338 9.132 8.921 8.708 8.492 8.276 8.059 7.842 7.627 7.413 7.201 6.991 6.785 6.581 6.381 6.185 5.993 5.805 5.621 5.441 5.266 5.095 4.928 4.766 4.609 4.455 4.306 4.162 4.021 3.885 3.753 3.625 3.501 3.381 3.265 3.152 3.043 2.938 2.836 2.737 2.642 2.55 2.461 2.375 2.292 2.211 2.134 2.059 1.986 1.916 1.849 1.784 1.721 1.66 1.601 1.545 1.49 1.437 1.386 1.337 1.29 1.244 1.2 1.158 1.116 1.077 1.039 1.002 0.966 0.932 0.899 0.867 0.836 0.806 0.778 0.75 0.723 0.698 0.673 0.649 0.626 0.603 0.582 0.561 0.541 0.522 0.503 0.486 0.468 0.452 0.436 0.42 0.405 0.391 0.377 0.363 0.35 0.338 0.326 0.314 0.303 0.292 0.282 0.272 0.262 0.253

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.392" PeakHeight="110.0" Num="3" Error="0.0">
-19.995 2.995 -0.205
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.392" EndFrequency="10.95" PeakHeight="411.584" Num="5" zHalfNm="353.595" Error="4.613">
-197.877 -25.287 11.996 -5.391 3.259
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="88.284" Depth="0.192"/>
<TopsideChapman PeakHeight="411.584" PeakDensity="1487624.1" PeakScaleHeight="43.08" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
