<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-28 -087 01:10:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, F2 cusps do not match</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" >
2026.03.28 (087) 01:10:00</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">
FF202608703280110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.449" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.554" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="561.441" 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="2.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="459.810" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="398.968" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.949" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="89.933" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="19.244" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.472" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 340.000 355.000 365.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 402.500 405.000 406.667 408.333 410.000 400.000 396.667 393.333 390.000 388.750 387.500 386.250 385.000 385.000 385.000 380.000 385.000 385.000 385.000 390.000 393.333 396.667 400.000 410.000 420.000 421.667 423.333 425.000 425.000 425.000 428.182 431.364 434.545 437.727 440.909 444.091 447.273 450.455 453.636 456.818 460.000 450.000 440.000 460.000 458.824 457.647 456.471 455.294 454.118 452.941 451.765 450.588 449.412 448.235 447.059 445.882 444.706 443.529 442.353 441.176 440.000 445.000 445.000 446.667 448.333 450.000 450.000 450.000 451.250 452.500 453.750 455.000 455.000 455.000 453.000 451.000 449.000 447.000 445.000 445.000 440.000 432.500 425.000 430.000 430.000 420.000 425.500 431.000 436.500 442.000 447.500 453.000 458.500 464.000 469.500 475.000 475.000 475.000 485.000 490.000 494.091 498.182 502.273 506.364 510.455 514.545 518.636 522.727 526.818 530.909 535.000 535.000 540.000 543.333 546.667 550.000 555.102 561.441 569.530 580.209 594.960 616.660
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 54 51 54 54 54 57 60 60 60 0 66 0 57 0 0 57 57 0 0 57 0 0 0 66 60 63 0 0 0 63 60 0 0 54 57 54 0 0 51 0 57 60 0 0 0 0 0 54 0 0 54 48 0 57 51 0 0 0 0 0 0 0 0 0 0 0 54 0 0 54 54 54 51 54 0 0 54 0 51 0 0 0 57 0 57 0 0 51 57 54 57 54 0 57 48 54 51 0 0 0 0 0 0 0 0 0 57 0 57 51 54 0 54 51 57 54 57 51 60 0 48 54 51 51 0 0 51 0 0 48 0 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 1.171875 1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 1.953125 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 1.953125 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 -0.390625 -1.171875 -0.390625 -1.171875 1.171875 1.953125 0.390625 -1.171875 1.171875 0.390625 1.171875 1.171875 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 1.171875 -0.390625 1.953125 0.390625 1.171875 0.390625 1.171875 -2.734375 0.390625 0.390625 0.390625 1.953125 1.953125 -1.953125 1.953125 0.390625 -1.171875 -1.171875 1.953125 -0.390625 -0.390625 1.953125 1.953125 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 1.171875 1.953125 -0.390625 0.390625 -1.171875 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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.062 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.125 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.187 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 459.81 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 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 0.345 0.334 0.317 0.294 0.263 0.222 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.224 0.245 0.266 0.287 0.308 0.328 0.349 0.354 0.388 0.442 0.506 0.579 0.66 0.746 0.837 0.93 1.027 1.128 1.231 1.339 1.451 1.567 1.688 1.815 1.947 2.085 2.23 2.383 2.543 2.712 2.89 3.079 3.278 3.488 3.711 3.946 4.195 4.457 4.734 5.024 5.327 5.64 5.963 6.29 6.619 6.942 7.256 7.553 7.828 8.076 8.292 8.473 8.616 8.719 8.78 8.8 8.8 8.79 8.761 8.715 8.653 8.577 8.487 8.387 8.275 8.155 8.026 7.89 7.748 7.601 7.45 7.295 7.138 6.979 6.818 6.657 6.495 6.334 6.173 6.013 5.855 5.698 5.543 5.39 5.239 5.091 4.945 4.803 4.663 4.525 4.391 4.26 4.132 4.007 3.885 3.766 3.65 3.537 3.427 3.32 3.216 3.115 3.017 2.921 2.829 2.739 2.651 2.567 2.484 2.405 2.327 2.252 2.179 2.109 2.041 1.975 1.91 1.848 1.788 1.73 1.673 1.619 1.566 1.515 1.465 1.417 1.371 1.326 1.282 1.24 1.2 1.16 1.122 1.085 1.049 1.015 0.982 0.949 0.918 0.888 0.859 0.83 0.803 0.776 0.751 0.726 0.702 0.679 0.657 0.635 0.614 0.594 0.574 0.555 0.537 0.519 0.502 0.485 0.469 0.454 0.439 0.424 0.41 0.397 0.384

</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="8.8" PeakHeight="459.81" Num="5" zHalfNm="398.968" Error="6.947">
-216.662 -31.782 8.996 3.906 -3.081
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.187" Depth="0.154"/>
<TopsideChapman PeakHeight="459.81" PeakDensity="960794.06" PeakScaleHeight="46.472" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
