<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 21:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.02.26 (057) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605702262130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.541" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.662" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="9.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="512.445" 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="0.765" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="401.145" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="323.467" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.089" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="112.648" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.068" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.454" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="114.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.890" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="145">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.833 306.667 307.500 308.333 309.167 310.000 310.833 311.667 312.500 313.333 314.167 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 321.000 322.000 323.000 324.000 325.000 325.000 325.000 326.667 328.333 330.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 345.000 340.000 341.667 343.333 345.000 346.667 348.333 350.000 350.000 350.000 355.000 352.500 350.000 355.000 355.000 355.000 360.000 361.667 363.333 365.000 365.000 366.250 367.500 368.750 370.000 375.000 376.667 378.333 380.000 380.000 380.000 380.000 385.000 386.000 387.000 388.000 389.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 405.000 410.000 410.000 412.500 415.000 420.000 420.000 420.000 425.000 425.000 425.000 427.500 430.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 455.000 455.000 460.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 480.000 485.000 485.000 490.000 495.000 500.000 500.000 505.000 508.493 512.445 516.951 522.138 528.171 535.278 543.772 554.102 566.939 583.318 604.941
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 63 0 0 57 63 0 63 0 63 0 0 0 0 0 0 0 0 0 0 54 51 48 0 60 63 66 0 0 0 0 66 57 0 0 0 69 0 0 63 0 0 63 0 60 60 54 69 0 0 0 69 0 66 51 69 63 0 0 63 0 0 63 0 0 60 63 0 54 0 66 57 0 0 57 63 69 69 60 0 0 0 0 66 66 66 63 66 66 69 69 0 69 72 69 66 69 0 66 54 60 66 54 60 63 57 63 57 60 51 57 66 63 69 63 51 63 54 63 66 63 54 66 60 66 66 60 63 63 63 63 60 60 0 0 60 0 60 60 54 57 51 0 0
</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 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -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 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 2.734375 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -2.734375
</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" >
90.62 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.72 135.0 140.0 145.0 150.0 155.0 157.441 160.0 165.0 170.0 175.0 180.0 181.161 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 401.145 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.508 0.663 0.741 0.765 0.753 0.717 0.652 0.549 0.429 0.429 0.429 0.429 0.429 0.429 0.429 0.465 0.536 0.607 0.678 0.749 0.765 0.859 0.97 1.078 1.191 1.31 1.438 1.577 1.729 1.896 2.079 2.279 2.495 2.728 2.975 3.235 3.504 3.782 4.065 4.352 4.642 4.933 5.224 5.514 5.804 6.093 6.38 6.665 6.948 7.227 7.503 7.775 8.041 8.301 8.554 8.797 9.028 9.245 9.445 9.625 9.782 9.911 10.008 10.072 10.099 10.1 10.096 10.077 10.046 10.001 9.945 9.878 9.8 9.714 9.619 9.516 9.405 9.289 9.167 9.04 8.908 8.772 8.633 8.491 8.347 8.201 8.053 7.905 7.755 7.605 7.455 7.305 7.156 7.007 6.859 6.712 6.566 6.422 6.279 6.138 5.998 5.861 5.725 5.591 5.46 5.331 5.203 5.078 4.956 4.835 4.717 4.601 4.487 4.376 4.267 4.16 4.056 3.954 3.854 3.756 3.66 3.567 3.476 3.387 3.299 3.214 3.131 3.05 2.971 2.894 2.819 2.745 2.674 2.604 2.536 2.469 2.404 2.341 2.279 2.219 2.161 2.104 2.048 1.994 1.941 1.89 1.84 1.791 1.744 1.697 1.652 1.608 1.566 1.524 1.483 1.444 1.405 1.368 1.332 1.296 1.261 1.228 1.195 1.163 1.132 1.102 1.072 1.044 1.016 0.989 0.962 0.937 0.911 0.887 0.863 0.84 0.818 0.796 0.775 0.754 0.734 0.714 0.695 0.676 0.658 0.641

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.765" PeakHeight="110.0" Num="3" Error="0.0">
-25.166 6.654 -0.868
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.765" EndFrequency="10.1" PeakHeight="401.145" Num="5" zHalfNm="323.467" Error="3.543">
-214.262 -11.218 8.039 -5.544 3.001
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="71.161" Depth="0.336"/>
<TopsideChapman PeakHeight="401.145" PeakDensity="1265632.8" PeakScaleHeight="57.454" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
