<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 13:10:00.000"
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 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" >
2026.03.27 (086) 13:10:00</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">
FF202608603271310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.711" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.534" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="205.000" 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="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="456.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.267" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.303" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="345.411" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="264.221" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.349" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="107.060" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="48.161" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="60.516" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="146.310" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="154">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.9 11.95 12.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 207.500 210.000 210.000 215.000 220.000 225.000 230.000 235.000 240.000 245.000 250.000 255.000 260.000 265.000 270.000 270.000 275.000 275.000 280.000 285.000 285.000 290.000 292.500 295.000 295.000 300.000 301.250 302.500 303.750 305.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.714 321.429 322.143 322.857 323.571 324.286 325.000 325.000 330.000 330.000 330.000 330.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.714 396.429 397.143 397.857 398.571 399.286 400.000 405.000 405.000 405.000 410.000 410.000 405.000 407.500 410.000 412.500 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 427.500 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 445.000 445.000 450.000 450.000 450.000 450.000 452.000 454.000 456.000 459.853 464.069 468.702 473.819 479.497 485.837 492.958 501.017 510.211 520.799 533.122 547.646
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 54 48 0 0 0 0 0 0 0 0 0 48 48 54 54 48 0 51 48 51 0 54 54 0 0 0 0 51 51 48 57 57 51 54 54 54 54 57 0 48 0 0 57 0 51 48 60 60 60 54 0 60 63 66 66 63 63 51 63 60 66 0 63 66 66 63 63 66 69 60 66 66 63 66 66 60 63 48 63 60 60 0 57 63 66 66 63 66 63 66 66 66 69 69 66 0 0 0 0 0 0 54 66 66 66 66 66 63 0 0 0 63 63 63 60 60 0 0 57 57 42 48 51 0 54 54 54 54 51 0 45 48 45 48 48 48 0 0 0 45 45 45 48 48 0 45 0 48 48 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 0.390625 1.953125 -2.734375 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 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 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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 2.734375 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 -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" >
89.502 90.0 95.0 100.0 105.0 110.0 112.061 114.122 115.0 116.183 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 345.411 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.197 2.827 3.161 3.267 3.145 3.145 3.197 3.267 3.373 3.513 3.657 3.803 3.951 4.101 4.253 4.407 4.563 4.722 4.882 5.045 5.21 5.377 5.547 5.72 5.895 6.074 6.256 6.441 6.63 6.822 7.019 7.219 7.424 7.634 7.848 8.067 8.292 8.521 8.756 8.997 9.243 9.493 9.749 10.008 10.27 10.533 10.794 11.048 11.291 11.514 11.708 11.861 11.962 12.0 12.0 11.993 11.972 11.935 11.886 11.823 11.749 11.664 11.568 11.464 11.35 11.229 11.1 10.966 10.825 10.679 10.529 10.375 10.217 10.056 9.893 9.728 9.562 9.394 9.225 9.056 8.887 8.718 8.549 8.381 8.213 8.047 7.882 7.719 7.556 7.396 7.238 7.081 6.926 6.774 6.623 6.475 6.329 6.186 6.045 5.906 5.77 5.636 5.505 5.376 5.249 5.125 5.004 4.884 4.768 4.653 4.542 4.432 4.325 4.22 4.117 4.017 3.919 3.823 3.729 3.637 3.548 3.46 3.375 3.291 3.21 3.13 3.052 2.976 2.902 2.83 2.759 2.69 2.623 2.557 2.493 2.43 2.369 2.31 2.252 2.195 2.14 2.086 2.033 1.982 1.932 1.883 1.835 1.789 1.744 1.7 1.657 1.615 1.574 1.534 1.495 1.457 1.42 1.384 1.349 1.315 1.282 1.249 1.217 1.186 1.156 1.127 1.098 1.07 1.043 1.017 0.991 0.966 0.941 0.917 0.894 0.871 0.849 0.827 0.806 0.786 0.766 0.746 0.727 0.709 0.691 0.673

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.267" PeakHeight="110.0" Num="3" Error="0.0">
-30.41 13.017 -3.105
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.267" EndFrequency="12.0" PeakHeight="345.411" Num="5" zHalfNm="264.221" Error="3.627">
-179.651 -60.622 11.235 0.206 -0.396
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.183" Depth="0.122"/>
<TopsideChapman PeakHeight="345.411" PeakDensity="1786600.5" PeakScaleHeight="60.516" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
