<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-03 -062 18:40:00.000"
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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 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" >
2026.03.03 (062) 18:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606203031840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="12.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.528" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.981" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.600" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.960" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.411" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.130" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.930" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="517.206" 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="2.892" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.198" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="285.009" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.546" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.914" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.781" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.055" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="162.770" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.200" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="181">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
210.000 210.000 210.000 213.000 216.000 219.000 222.000 225.000 228.000 231.000 234.000 237.000 240.000 240.000 243.000 246.000 249.000 252.000 255.000 260.000 262.500 265.000 265.000 265.000 265.000 275.000 275.000 275.000 275.000 277.500 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 292.500 295.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 310.000 312.500 315.000 317.500 320.000 320.000 320.000 320.000 325.000 330.000 325.000 327.500 330.000 332.500 335.000 340.000 342.500 345.000 346.250 347.500 348.750 350.000 352.500 355.000 355.000 357.500 360.000 360.000 365.000 365.000 365.000 365.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 392.500 395.000 395.000 397.500 400.000 400.000 405.000 405.000 405.000 407.500 410.000 410.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 445.000 446.667 448.333 450.000 451.667 453.333 455.000 455.000 455.000 455.000 457.500 460.000 460.000 460.000 465.000 467.500 470.000 470.000 472.000 474.000 476.000 478.000 480.000 480.000 482.500 485.000 487.500 490.000 495.000 495.000 495.000 497.500 500.000 502.500 505.000 508.759 512.815 517.206 521.974 527.172 532.858 539.106 546.003 553.657 562.197 571.789 582.639 595.012 609.252
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 0 0 0 0 0 0 0 0 0 48 54 0 0 0 0 54 51 0 54 57 0 54 45 51 0 63 0 60 63 66 63 60 63 60 0 0 0 0 63 60 0 63 63 63 63 63 0 0 0 54 60 66 69 0 54 66 48 66 0 69 63 45 57 0 51 0 66 54 63 66 57 66 69 63 66 72 69 48 60 66 72 60 69 57 63 69 72 69 69 63 72 69 63 69 66 63 66 69 0 66 72 66 69 72 69 69 66 0 66 0 69 0 66 66 66 0 63 63 63 63 0 60 60 63 60 0 60 0 60 60 0 0 0 0 0 51 57 0 57 0 57 0 54 57 0 54 57 0 0 0 0 57 57 42 54 42 54 57 54 0 0 51 54 48 51 51 0 45 0 51 0 0 48 51 48 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 1.953125 -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 -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 -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 -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 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.411 101.779 103.291 104.983 106.906 109.141 111.818 115.183
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 0 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 1.171875 0.390625 0.390625 -0.390625 -2.734375 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" >
90.0 95.0 99.13 100.0 102.837 105.0 106.544 110.0 110.251 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.198 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.622 2.96 2.953 2.835 2.835 2.835 2.952 2.96 3.064 3.178 3.298 3.423 3.552 3.687 3.826 3.97 4.118 4.269 4.425 4.584 4.746 4.912 5.08 5.251 5.425 5.601 5.78 5.961 6.144 6.33 6.517 6.707 6.899 7.093 7.29 7.488 7.689 7.893 8.098 8.306 8.516 8.729 8.944 9.162 9.383 9.605 9.83 10.058 10.287 10.518 10.75 10.982 11.214 11.444 11.669 11.886 12.09 12.276 12.434 12.556 12.63 12.65 12.65 12.641 12.621 12.588 12.545 12.491 12.428 12.355 12.273 12.183 12.086 11.982 11.871 11.755 11.633 11.506 11.374 11.239 11.1 10.958 10.812 10.665 10.515 10.364 10.211 10.057 9.901 9.746 9.59 9.433 9.277 9.121 8.965 8.81 8.655 8.501 8.349 8.197 8.047 7.898 7.75 7.604 7.46 7.317 7.175 7.036 6.898 6.763 6.629 6.496 6.366 6.238 6.112 5.988 5.865 5.745 5.627 5.511 5.396 5.284 5.174 5.065 4.959 4.854 4.752 4.651 4.552 4.455 4.36 4.267 4.176 4.086 3.998 3.912 3.827 3.745 3.664 3.584 3.506 3.43 3.355 3.282 3.211 3.141 3.072 3.005 2.939 2.874 2.811 2.749 2.689 2.63 2.572 2.515 2.46 2.405 2.352 2.3 2.249 2.2 2.151 2.103 2.057 2.011 1.967 1.923 1.88 1.839 1.798 1.758 1.719 1.681 1.643 1.607 1.571 1.536 1.502 1.468 1.436 1.404 1.372 1.342 1.312 1.283 1.254

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.96" PeakHeight="99.13" Num="3" Error="1.31">
-13.467 5.649 -1.312
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.96" EndFrequency="12.65" PeakHeight="379.198" Num="5" zHalfNm="285.009" Error="3.223">
-215.483 -67.007 17.757 -4.287 0.073
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.121" Depth="0.125"/>
<TopsideChapman PeakHeight="379.198" PeakDensity="1985390.9" PeakScaleHeight="69.055" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
