<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-28 -059 14:30:00.000"
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" >
2026.02.28 (059) 14:30:00</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">
FF202605902281430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.485" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.964" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="10.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" 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="3.388" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.359" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="358.579" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="248.991" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.377" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="137.691" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.940" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.237" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="184.880" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.180" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 280.000 283.000 286.000 289.000 292.000 295.000 298.000 301.000 304.000 307.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 321.250 322.500 323.750 325.000 325.000 327.500 330.000 330.000 335.000 335.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 390.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 450.000 450.000 455.000 455.000 460.000 465.000 470.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 495.000 497.500 500.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 535.000 540.000 545.000 550.000 555.000 561.479 568.936 577.610 587.828
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 51 0 0 0 0 0 0 0 45 0 0 48 51 48 54 54 51 48 0 0 0 51 51 0 51 45 48 51 48 51 0 54 54 54 51 54 54 57 51 57 60 60 60 51 60 60 57 63 63 66 66 66 60 63 63 63 57 63 60 66 60 54 60 54 60 60 57 60 54 54 57 54 54 57 51 54 57 51 42 51 54 54 54 51 57 51 57 51 54 51 54 51 0 45 0 42 42 48 48 48 48 45 48 48 51 51 48 45 42 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 0.390625 -1.953125 -1.953125 2.734375 2.734375 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 -1.953125 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 1.171875 0.390625 1.171875 -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 2.734375 -2.734375 -0.390625
</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" >
89.484 90.0 95.0 100.0 105.0 110.0 111.56 113.12 114.68 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 358.579 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.279 2.932 3.278 3.388 3.265 3.265 3.388 3.399 3.56 3.71 3.855 3.999 4.142 4.286 4.433 4.582 4.734 4.889 5.047 5.208 5.372 5.537 5.705 5.874 6.043 6.213 6.382 6.551 6.72 6.887 7.053 7.218 7.381 7.544 7.704 7.864 8.023 8.18 8.336 8.492 8.647 8.802 8.956 9.11 9.264 9.418 9.572 9.727 9.882 10.037 10.192 10.345 10.494 10.633 10.752 10.831 10.85 10.85 10.843 10.827 10.803 10.771 10.732 10.686 10.633 10.573 10.508 10.437 10.361 10.28 10.194 10.105 10.011 9.914 9.813 9.71 9.603 9.495 9.384 9.271 9.156 9.04 8.923 8.804 8.685 8.565 8.444 8.323 8.201 8.08 7.958 7.837 7.716 7.595 7.475 7.355 7.236 7.118 7.001 6.884 6.768 6.654 6.54 6.427 6.316 6.206 6.097 5.989 5.883 5.777 5.673 5.571 5.47 5.37 5.272 5.175 5.079 4.985 4.892 4.8 4.71 4.622 4.535 4.449 4.364 4.281 4.199 4.119 4.04 3.962 3.886 3.811 3.737 3.665 3.594 3.524 3.455 3.388 3.321 3.256 3.192 3.13 3.068 3.008 2.948 2.89 2.833 2.777 2.722 2.668 2.615 2.563 2.512 2.462 2.413 2.365 2.318 2.272 2.227 2.182 2.138 2.096 2.054 2.013 1.972 1.933 1.894 1.856 1.819 1.782 1.746 1.711 1.677 1.643 1.61 1.578 1.546 1.515 1.484 1.454 1.425 1.396 1.368 1.341 1.314 1.287

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.388" PeakHeight="110.0" Num="3" Error="0.0">
-30.499 13.149 -3.166
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.388" EndFrequency="10.85" PeakHeight="358.579" Num="5" zHalfNm="248.991" Error="3.534">
-198.921 -65.602 27.611 -10.09 3.103
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.68" Depth="0.123"/>
<TopsideChapman PeakHeight="358.579" PeakDensity="1460576.9" PeakScaleHeight="76.237" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
