<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 21:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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) 21:50:00</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">
FF202608003212150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.627" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.009" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.600" 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="0.401" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="405.404" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="340.692" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.938" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="94.818" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="25.136" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.566" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="95.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.900" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="148">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 316.667 318.333 320.000 321.000 322.000 323.000 324.000 325.000 325.000 325.833 326.667 327.500 328.333 329.167 330.000 330.000 330.000 330.000 325.000 325.000 326.429 327.857 329.286 330.714 332.143 334.107 336.071 338.036 340.000 340.000 340.000 335.000 336.667 338.333 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 347.500 345.000 350.000 350.000 350.000 355.000 355.000 355.000 355.000 356.250 357.500 358.750 360.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 367.500 370.000 370.000 370.000 375.000 376.000 377.000 378.000 379.000 380.000 380.000 381.667 383.333 385.000 386.667 388.333 390.000 390.000 390.000 392.500 395.000 395.000 395.000 396.667 398.333 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 435.000 435.000 435.000 437.500 440.000 442.500 445.000 445.000 445.000 450.000 455.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 507.445 517.274 530.849 550.818 583.088
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 0 0 66 0 0 0 0 63 63 0 0 0 0 0 60 63 66 69 72 69 0 0 0 0 63 0 0 0 51 54 54 63 0 0 72 75 0 72 69 0 0 72 57 0 72 69 48 69 57 0 63 66 0 0 0 57 0 66 48 69 57 60 0 72 0 75 66 75 75 0 78 0 0 69 0 0 0 0 69 69 0 0 69 51 0 66 69 69 0 63 69 72 0 0 72 66 60 66 66 69 63 69 54 60 66 69 69 66 69 57 63 66 69 66 54 57 63 0 63 0 60 63 66 66 57 60 66 60 63 63 54 60 57 63 57 63 57 63 60 54 66 60 0 0 0 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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 -1.171875 -0.390625 -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 -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 -2.734375 -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 -2.734375 0.390625 1.953125 -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" >
92.655 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.299 140.0 145.0 150.0 155.0 160.0 165.0 168.598 170.0 175.0 180.0 185.0 190.0 195.0 197.897 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 405.404 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.265 0.347 0.388 0.401 0.397 0.383 0.359 0.323 0.27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.244 0.278 0.313 0.347 0.381 0.401 0.435 0.517 0.603 0.695 0.796 0.906 1.026 1.159 1.304 1.462 1.635 1.823 2.026 2.244 2.478 2.727 2.991 3.268 3.56 3.863 4.179 4.505 4.839 5.182 5.531 5.884 6.24 6.597 6.952 7.302 7.644 7.976 8.294 8.595 8.873 9.126 9.349 9.539 9.692 9.804 9.874 9.9 9.9 9.892 9.864 9.818 9.756 9.679 9.588 9.484 9.369 9.243 9.109 8.967 8.818 8.664 8.504 8.34 8.173 8.003 7.832 7.659 7.485 7.311 7.137 6.964 6.792 6.621 6.451 6.284 6.119 5.956 5.795 5.637 5.482 5.33 5.18 5.034 4.891 4.751 4.614 4.48 4.349 4.221 4.097 3.975 3.857 3.742 3.63 3.52 3.414 3.311 3.21 3.113 3.018 2.925 2.836 2.748 2.664 2.582 2.502 2.425 2.349 2.277 2.206 2.137 2.071 2.006 1.944 1.883 1.824 1.767 1.712 1.658 1.606 1.556 1.507 1.46 1.414 1.369 1.326 1.285 1.244 1.205 1.167 1.13 1.095 1.06 1.027 0.994 0.963 0.933 0.903 0.875 0.847 0.82 0.794 0.769 0.745 0.721 0.699 0.676 0.655 0.634 0.614 0.595 0.576 0.558 0.54 0.523 0.507 0.491 0.475 0.46 0.445 0.431 0.418 0.405 0.392 0.379 0.367 0.356

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.401" PeakHeight="110.0" Num="3" Error="0.0">
-20.243 3.117 -0.219
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.401" EndFrequency="9.9" PeakHeight="405.404" Num="5" zHalfNm="340.692" Error="2.139">
-203.206 -8.41 4.388 -1.113 0.834
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.897" Depth="0.201"/>
<TopsideChapman PeakHeight="405.404" PeakDensity="1216005.0" PeakScaleHeight="48.566" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
