<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 21:10:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.21 (080) 21:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202608003212110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.624" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.261" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="1.016" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="377.883" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="306.138" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.371" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="104.044" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.162" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.565" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="163">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.0 11.05 11.1 11.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 291.000 292.000 293.000 294.000 295.000 296.000 297.000 298.000 299.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 303.333 306.667 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 317.500 320.000 320.000 320.000 315.000 316.250 317.500 318.750 320.000 325.000 325.625 326.250 326.875 327.500 328.125 328.750 329.375 330.000 335.000 335.000 335.000 340.000 340.000 340.000 341.667 343.333 345.000 345.000 347.500 350.000 350.000 351.667 353.333 355.000 355.000 355.000 355.000 357.500 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 382.500 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 425.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 462.500 465.000 470.000 470.000 475.000 475.000 480.000 475.000 480.000 482.500 485.000 490.000 492.500 495.000 500.151 506.144 513.202 521.638 531.898 544.646 560.912
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 0 72 72 72 72 72 0 0 69 66 63 72 69 0 0 0 0 0 0 0 0 0 0 0 72 72 72 72 0 0 0 0 57 60 63 66 0 0 69 69 0 66 69 51 57 60 66 0 0 72 0 0 69 0 60 0 66 0 69 0 69 69 0 72 63 0 69 54 0 66 69 0 63 66 0 0 60 0 69 72 0 66 72 72 63 0 72 72 66 69 75 75 66 72 57 66 69 54 63 69 72 60 66 69 57 63 69 72 63 69 72 72 72 57 66 69 72 66 69 69 69 57 63 69 60 66 69 66 69 60 63 63 66 63 66 63 63 54 60 54 60 57 60 54 57 57 54 57 51 54 54 51 51 51 51 48 45 0 0 0
</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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 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 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 0.390625 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" >
90.254 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.604 130.0 135.0 140.0 143.208 145.0 150.0 155.0 159.812 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 377.883 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.676 0.88 0.984 1.016 0.999 0.946 0.851 0.81 0.81 0.81 0.81 0.81 0.832 0.894 0.956 1.016 1.022 1.167 1.295 1.422 1.552 1.689 1.834 1.99 2.158 2.34 2.536 2.747 2.973 3.213 3.466 3.73 4.003 4.283 4.569 4.858 5.151 5.445 5.741 6.037 6.334 6.631 6.927 7.224 7.521 7.817 8.112 8.407 8.7 8.99 9.278 9.56 9.835 10.1 10.351 10.582 10.786 10.953 11.074 11.14 11.15 11.148 11.131 11.095 11.043 10.974 10.892 10.796 10.689 10.57 10.441 10.304 10.159 10.007 9.848 9.685 9.517 9.346 9.171 8.994 8.815 8.635 8.455 8.274 8.093 7.912 7.732 7.554 7.377 7.201 7.028 6.856 6.687 6.52 6.356 6.194 6.035 5.879 5.726 5.575 5.428 5.284 5.142 5.004 4.869 4.737 4.607 4.481 4.358 4.237 4.12 4.005 3.894 3.785 3.679 3.575 3.474 3.376 3.281 3.188 3.097 3.009 2.923 2.84 2.758 2.679 2.603 2.528 2.455 2.384 2.316 2.249 2.184 2.121 2.06 2.0 1.942 1.886 1.831 1.778 1.727 1.676 1.628 1.58 1.534 1.49 1.446 1.404 1.363 1.324 1.285 1.248 1.211 1.176 1.142 1.108 1.076 1.045 1.014 0.984 0.956 0.928 0.901 0.874 0.849 0.824 0.8 0.777 0.754 0.732 0.71 0.69 0.669 0.65 0.631 0.612 0.594 0.577 0.56 0.544 0.528 0.512 0.497 0.483 0.469 0.455

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.016" PeakHeight="110.0" Num="3" Error="0.0">
-26.575 8.072 -1.243
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.016" EndFrequency="11.15" PeakHeight="377.883" Num="5" zHalfNm="306.138" Error="3.586">
-200.433 -28.474 14.867 -7.432 3.401
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="49.812" Depth="0.206"/>
<TopsideChapman PeakHeight="377.883" PeakDensity="1542462.8" PeakScaleHeight="52.565" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
