<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 23:50:00.000"
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" >
2026.03.22 (081) 23:50:00</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">
FF202608103222350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.560" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.424" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="335.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="335.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="501.600" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="414.499" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="350.392" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.591" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="94.166" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="21.130" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.735" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="94.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.950" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="117">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
335.000 335.000 335.000 335.000 335.000 335.625 336.250 336.875 337.500 338.125 338.750 339.375 340.000 340.000 340.000 341.667 343.333 345.000 345.000 345.000 350.000 350.000 350.000 345.000 345.000 347.500 350.000 350.000 350.000 350.000 355.000 355.714 356.429 357.143 357.857 358.571 359.286 360.000 365.000 370.000 371.000 372.000 373.000 374.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 407.500 410.000 415.000 416.667 418.333 420.000 420.000 425.000 430.000 430.000 431.667 433.333 435.000 440.000 440.000 445.000 445.000 447.500 450.000 450.000 450.000 452.500 455.000 460.000 465.000 465.000 470.000 470.000 470.000 470.000 470.000 476.667 483.333 490.000 490.000 491.862 493.917 496.197 498.742 501.600 504.833 508.520 512.764 517.700 523.515 530.464 538.917 549.419 562.820
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 0 0 0 66 0 0 0 0 0 57 0 69 0 72 0 0 84 0 87 78 0 0 0 72 0 72 72 0 69 66 0 0 0 54 0 0 51 51 51 0 0 0 0 48 54 60 60 57 54 54 51 0 54 57 60 0 0 69 72 66 54 57 0 72 69 66 66 0 57 60 0 0 60 60 0 54 60 0 0 66 57 63 60 60 54 60 66 63 66 72 72 69 72 72 69 0 69 66 63 0 63 60 63 66 60 60 57 57 63 66 63 60 66 63 51 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 -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 -1.953125 0.390625 0.390625 -2.734375 1.171875 -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 -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 0.390625 0.390625 0.390625 -2.734375 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
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.62 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.241 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.861 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 414.499 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.314 0.289 0.254 0.207 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.216 0.238 0.259 0.281 0.303 0.324 0.346 0.354 0.41 0.493 0.578 0.67 0.773 0.888 1.02 1.168 1.337 1.525 1.734 1.962 2.207 2.468 2.741 3.025 3.317 3.616 3.921 4.23 4.543 4.858 5.176 5.494 5.813 6.13 6.445 6.757 7.063 7.362 7.65 7.925 8.183 8.421 8.632 8.814 8.96 9.067 9.131 9.15 9.15 9.138 9.109 9.062 9.0 8.924 8.835 8.734 8.623 8.502 8.373 8.237 8.095 7.948 7.796 7.64 7.482 7.321 7.159 6.996 6.833 6.669 6.506 6.343 6.182 6.022 5.864 5.708 5.554 5.402 5.253 5.106 4.962 4.821 4.683 4.548 4.415 4.286 4.159 4.036 3.916 3.798 3.684 3.572 3.464 3.358 3.255 3.155 3.058 2.964 2.872 2.783 2.696 2.612 2.531 2.451 2.374 2.3 2.227 2.157 2.089 2.023 1.959 1.897 1.837 1.779 1.722 1.667 1.614 1.563 1.513 1.465 1.418 1.373 1.329 1.286 1.245 1.205 1.167 1.129 1.093 1.058 1.024 0.992 0.96 0.929 0.899 0.87 0.842 0.815 0.789 0.764 0.739 0.715 0.692 0.67 0.649 0.628 0.608 0.588 0.569 0.551 0.533 0.516 0.499 0.483 0.468 0.453 0.438 0.424 0.41 0.397 0.384 0.372 0.36 0.349 0.337 0.326

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="9.15" PeakHeight="414.499" Num="5" zHalfNm="350.392" Error="4.441">
-197.727 -4.647 6.884 -4.509 2.361
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="106.861" Depth="0.154"/>
<TopsideChapman PeakHeight="414.499" PeakDensity="1038740.7" PeakScaleHeight="47.735" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
