<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-21 -080 23:10:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.21 (080) 23:10:00</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">
FF202608003212310009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.757" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.156" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" 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="0.700" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="441.946" 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="1.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.259" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="319.284" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.958" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.294" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.429" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.413" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="87.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="134">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.75 1.8 1.85 1.9 1.95 2.0 2.05 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 286.429 287.857 289.286 290.714 292.143 293.571 295.000 295.000 307.500 320.000 320.000 352.500 385.000 368.000 351.000 334.000 317.000 300.000 301.000 302.000 303.000 304.000 305.000 306.667 308.333 310.000 310.000 310.000 310.714 311.429 312.143 312.857 313.571 314.286 315.000 320.000 320.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 357.222 359.444 361.667 363.889 366.111 368.333 370.556 372.778 375.000 380.000 382.500 385.000 385.000 385.000 390.000 390.000 392.500 395.000 390.000 400.000 405.000 407.500 410.000 410.000 412.000 414.000 416.000 418.000 420.000 425.000 425.941 426.980 428.133 429.420 430.865 432.500 434.364 436.510 439.006 441.946 445.460 449.733 455.044 461.819 470.765 483.120 501.294 530.663 586.179
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 63 0 0 66 0 0 69 57 69 0 69 69 0 66 0 69 0 0 75 75 0 0 0 0 0 0 0 0 0 57 57 0 48 0 0 0 0 72 0 0 0 0 66 0 0 66 0 69 0 75 0 0 0 0 69 69 0 72 0 63 0 0 0 60 0 0 60 54 60 60 66 72 69 63 72 69 69 54 66 72 54 72 69 0 0 0 0 0 0 0 0 57 57 0 54 63 66 57 66 0 63 66 60 60 0 60 63 0 0 0 0 63 66 63 69 0 0 0 0 66 63 69 69 69 72 66 0 54 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 0.390625 0.390625 1.171875 0.390625 2.734375 -0.390625 1.171875 -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 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 -1.953125 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 1.171875 0.390625 0.390625 0.390625 2.734375 1.171875 -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 1.953125 -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 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.402 145.0 150.0 155.0 160.0 165.0 170.0 175.0 178.805 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.207 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.259 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.311 0.283 0.246 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.205 0.228 0.25 0.272 0.295 0.317 0.34 0.354 0.376 0.451 0.546 0.665 0.81 0.98 1.174 1.391 1.63 1.89 2.17 2.469 2.785 3.116 3.46 3.815 4.178 4.546 4.914 5.28 5.639 5.989 6.325 6.645 6.945 7.223 7.475 7.7 7.897 8.062 8.196 8.297 8.364 8.396 8.4 8.397 8.379 8.344 8.294 8.231 8.154 8.066 7.968 7.861 7.745 7.623 7.494 7.36 7.221 7.079 6.934 6.786 6.637 6.487 6.335 6.184 6.033 5.883 5.733 5.585 5.438 5.293 5.15 5.009 4.87 4.734 4.6 4.469 4.34 4.214 4.091 3.97 3.853 3.738 3.626 3.516 3.41 3.306 3.205 3.107 3.011 2.918 2.828 2.74 2.655 2.572 2.491 2.413 2.337 2.263 2.192 2.123 2.055 1.99 1.927 1.866 1.806 1.749 1.693 1.639 1.586 1.536 1.486 1.439 1.393 1.348 1.305 1.263 1.222 1.183 1.145 1.108 1.072 1.038 1.004 0.972 0.94 0.91 0.881 0.852 0.825 0.798 0.772 0.747 0.723 0.7 0.677 0.655 0.634 0.613 0.594 0.574 0.556 0.538 0.52 0.504 0.487 0.472 0.456 0.441 0.427 0.413 0.4 0.387 0.374 0.362 0.351 0.339 0.328 0.318 0.307 0.297 0.288 0.278 0.269 0.261 0.252 0.244 0.236

</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="8.4" PeakHeight="382.259" Num="5" zHalfNm="319.284" Error="6.39">
-179.537 13.667 -2.684 -0.0030 -0.495
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.207" Depth="0.154"/>
<TopsideChapman PeakHeight="382.259" PeakDensity="875434.25" PeakScaleHeight="47.413" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
