<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 14:10:00.000"
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" >
2026.03.27 (086) 14:10:00</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">
FF202608603271410009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.469" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.252" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" 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="3.375" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.353" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="378.101" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="272.656" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.773" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="137.017" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="58.520" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.195" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="181.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.190" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="136">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 280.000 282.500 285.000 290.000 295.000 297.500 300.000 300.000 300.000 305.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 325.000 326.500 328.000 329.500 331.000 332.500 334.000 335.500 337.000 338.500 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 370.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 453.333 456.667 460.000 460.000 462.500 465.000 465.000 465.000 467.500 470.000 472.500 475.000 480.000 480.833 481.667 482.500 483.333 484.167 485.000 495.000 495.000 500.000 500.000 505.000 507.500 510.000 510.000 510.000 520.000 522.500 525.000 530.000 530.000 535.000 540.000 545.000 550.000 555.000 560.000 566.943 574.938 584.244 595.212 608.332 624.303
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 48 51 48 0 48 54 51 0 0 48 51 57 0 0 54 51 48 0 0 0 0 0 48 0 0 0 54 54 0 57 57 60 60 57 57 60 57 51 0 57 54 60 0 60 60 63 63 60 63 54 60 66 54 60 63 54 60 51 57 63 63 63 63 54 54 57 57 60 57 63 57 63 63 63 57 63 63 60 63 63 60 51 57 60 63 60 0 60 0 0 54 57 0 48 57 54 0 57 0 54 45 0 0 0 0 0 42 45 48 45 51 48 0 45 45 0 45 0 48 45 45 0 0 0 42 0 45 42 42 45 0 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 1.171875 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 1.953125 -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 0.390625 2.734375 0.390625 0.390625 0.390625 -0.390625 0.390625 2.734375 -0.390625 -0.390625 1.953125 -0.390625 2.734375 -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 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -0.390625 -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" >
89.486 90.0 95.0 100.0 105.0 110.0 111.614 113.228 114.842 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.101 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.271 2.921 3.265 3.375 3.252 3.252 3.375 3.38 3.531 3.674 3.813 3.95 4.086 4.222 4.359 4.497 4.637 4.78 4.924 5.071 5.22 5.372 5.526 5.683 5.843 6.005 6.17 6.336 6.505 6.676 6.849 7.023 7.2 7.377 7.556 7.736 7.917 8.099 8.282 8.465 8.65 8.835 9.021 9.208 9.395 9.582 9.77 9.958 10.147 10.335 10.522 10.708 10.892 11.072 11.246 11.411 11.56 11.688 11.785 11.84 11.85 11.849 11.841 11.823 11.796 11.76 11.717 11.665 11.607 11.541 11.469 11.391 11.307 11.218 11.124 11.026 10.923 10.816 10.706 10.592 10.476 10.357 10.235 10.112 9.986 9.859 9.731 9.601 9.471 9.339 9.207 9.075 8.942 8.809 8.677 8.544 8.412 8.28 8.149 8.018 7.888 7.759 7.631 7.503 7.377 7.252 7.128 7.005 6.883 6.763 6.644 6.527 6.41 6.296 6.182 6.07 5.96 5.851 5.744 5.638 5.534 5.431 5.33 5.23 5.132 5.035 4.94 4.846 4.754 4.664 4.575 4.487 4.401 4.316 4.233 4.151 4.071 3.992 3.914 3.838 3.763 3.69 3.617 3.546 3.477 3.409 3.341 3.276 3.211 3.148 3.085 3.024 2.964 2.906 2.848 2.791 2.736 2.681 2.628 2.576 2.524 2.474 2.424 2.376 2.328 2.282 2.236 2.191 2.147 2.104 2.062 2.021 1.98 1.94 1.901 1.863 1.826 1.789 1.753 1.717 1.683 1.649 1.616 1.583 1.551 1.52

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.375" PeakHeight="110.0" Num="3" Error="0.0">
-30.489 13.135 -3.16
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.375" EndFrequency="11.85" PeakHeight="378.101" Num="5" zHalfNm="272.656" Error="3.407">
-213.446 -66.452 19.619 -4.863 1.883
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.842" Depth="0.123"/>
<TopsideChapman PeakHeight="378.101" PeakDensity="1742214.6" PeakScaleHeight="76.195" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
